Serious Sam Double D
Developer(s)Mommy's Best Games
Publisher(s)Devolver Digital[lower-alpha 1]
Designer(s)Nathan Fouts
Programmer(s)
  • Nathan Fouts
  • Richard Rosenthal
Artist(s)Nathan Fouts
Writer(s)AJ Johnson
Composer(s)Hamdija Ajanovic
SeriesSerious Sam
EngineXNA
Platform(s)Windows, Xbox 360
Release
  • Windows
  • August 30, 2011
  • October 21, 2013 (XXL)
  • Xbox 360
  • February 20, 2013 (XXL)
Genre(s)Side-scrolling shooter
Mode(s)Single-player, multiplayer (XXL)

Serious Sam Double D is a 2011 side-scrolling shooter game developed by Mommy's Best Games and published by Devolver Digital. The game follows Sam "Serious" Stone traveling through various historical settings to destroy the horde of his nemesis, Mental, and its teleportation beacons. As Sam, the player navigates 2D levels and can use the "gun stacker" to create vertical stacks of up to six weapons that are fired simultaneously. Enemies appear from all sides and their corpses can be used as platforms.

Announced in March 2011, Double D was created as part of the Serious Sam Indie Series to promote the release of Serious Sam 3: BFE. Devolver Digital requested a "Contra on acid" and designer Nathan Fouts modeled the game after Mommy's Best Games's first release, Weapon of Choice. Double D debuted for Windows in August 2011. Serious Sam Double D XXL, an expanded version, was co-released by Mastertronic for the Xbox 360 via Xbox Live Arcade in February 2013, introducing more content and a local cooperative multiplayer mode. This version was ported back to Windows and released in October 2013 as a free update for the original game.

Both versions of Double D were met with mixed reviews. The gun stacker was well received, although a lack of depth was noted. The sound design was praised. Conflicting opinions were raised regarding the game's writing, level design, music, and visual style. Its repetitiveness and technical issues were criticized.

Gameplay

Sam (left) clashing with a Caterfighter using a six-weapon stack

Serious Sam Double D is a 2D side-scrolling shooter with run and gun, platform, and exploration elements.[1][2] It is played as a twin-stick shooter with a gamepad or with a keyboard–mouse control combination.[3][4] The primary objective is leading Sam "Serious" Stone through various historical settings, fight enemies from the horde of his nemesis, Mental, and destroy teleportation beacons it placed.[5] The antagonist is General Maxilla, who is leading the horde on Mental's behalf.[6] Sam, as the player character, traverses confined levels, most of which have a primary route leading to the right, while others have branching paths, and some include puzzles.[7] Enemies approach from multiple directions and attack using varying behaviors: some engage in melee combat, others bear ranged weapons, and some act as suicide bombers.[6][8]

Sam can use up to four weapons of each of eight types, which can be collected throughout levels.[8][9] By default, he brandishes one machine pistol.[6] As part of the "gun stacker", using collectible connectors, the player can stack up to six weapons vertically and fire them simultaneously.[10] Eight stacks can be configured and at any time altered and swapped between.[4][11] Each gun has a separate type of ammunition, of which explosive projectiles may inflict self-harm on the character.[12][13] Once acquired, a portable jump pad can be thrown repeatedly. It remains where it lands, including on walls, and Sam and enemies bounce off it. Among other techniques, wall jumps can be performed using it.[7][10][14] Sam's movement direction can be adjusted mid-air.[1]

Upon death, enemies' corpses persist in place and become navigable platforms.[6][10] Some level sections continuously spawn enemies until enough corpses pave the way, either vertically or horizontally, for Sam to proceed.[7][10] Some collectibles are hidden, among them unlockable challenges that pit the player against a certain number of enemies with a pre-determined arsenal.[4][8] The game automatically saves the progress at checkpoints, while quicksaves can be performed manually.[11]

In Serious Sam Double D XXL, each type of weapon has four distinct upgrades.[9] These, as well as ammunition, can be purchased from shops using currency dropped by enemies that are killed by player characters.[13] For the local multiplayer mode, a second player, assuming the role of Dan "Huff" Huffington, can join in at any time and engage in cooperative gameplay. If either player character goes off-screen, he is automatically transported back to the other. If one of them dies, the other can resurrect him by collecting crosses the corpse emits.[9] Two players can also engage in head-to-head combat in a separate mode.[15] Of the twenty-one levels in XXL, three employ auto-running gameplay using vehicles.[13]

Development and release

Serious Sam Double D

Serious Sam Double D was developed by Mommy's Best Games, an indie game studio founded in 2007 by Nathan Fouts.[5] The studio had previously created Weapon of Choice (its first), Shoot 1Up, and Explosionade.[5][16] After coming across Weapon of Choice, Devolver Digital, the publisher of the Serious Sam series, contacted Fouts, asking him to create a game as part of the Serious Sam Indie Series. A triplet of spin-offs to be created by small studios to promote the impending launch of Serious Sam 3: BFE, the Indie Series also encompasses Serious Sam: Kamikaze Attack! and Serious Sam: The Random Encounter. Fouts had been a fan of the series, wherefore he accepted the request. The publisher sought a "Contra on acid", while Fouts ruled out simply creating a 2D conversion of a previous Serious Sam game.[16][17] Fouts modeled Double D after Weapon of Choice, re-using and improving on its development tools and XNA-based game engine.[16][18] Using a prototype image and specifications for the "gun stacker" mechanic, he pitched the idea to Devolver Digital, which replied with "Make this right now!"[16] The subtitle "Double D" characterizes that the game is in 2D, as opposed to previous entries in the series.[19]

Fouts was responsible for the design, hand-drawn art, animations, programming, and sound effects.[20][21] He was joined by three collaborators: Arizona-based Hamdija Ajanovic composed original music, Florida-based AJ Johnson wrote the story and dialog, and Richard Rosenthal provided further programming.[20][22] Croteam, the main developer of the Serious Sam series, was hands-off in the development.[16] Devolver Digital rarely interfered with Fouts's creative direction but provided funding and marketing.[23] The gun stacker was conceived as Fouts wanted to include irregular guns (as he had in his previous games) but constrained himself to those from previous Serious Sam games.[23][24] At one point, up to twelve guns could be stacked, but Fouts considered this chaotic and reduced the number to six.[24] The ability to stack chainsaws was added in response to a comment by user greyson97 on a Joystiq article about the game.[5] The jump pad was added to adapt the circle strafing technique often used in 3D Serious Sam games.[23][24] For levels that require the player to pile enemy corpses, Fouts was inspired by game covers that depicted the protagonist standing on such a pile, although the games themselves had no such element.[22][24] He picked ancient Egypt as the first setting, as fans of the series were already accustomed to it, and settled for original locations for later parts.[24] The game incorporates several enemies previously seen in other Serious Sam games, as well as original designs.[5]

The Serious Sam Indie Series was announced by Devolver Digital in March 2011.[25][26] An early version of Double D was playable at the PAX East trade show later that month,[27][28] and at E3 2011 in June.[29] During development, Fouts was under pressure to finish his game before Serious Sam 3: BFE was released.[24] Three trailers were published, one in July and two in August: The first two showcased parts of the gameplay, while the third coincided with the launch.[30][31][32] Fouts was not significantly involved in their creation but liked them nonetheless.[33] Double D was released for Windows on August 30, 2011, as the first entry in the Serious Sam Indie Series.[34][35] The game was cracked by the Theta group within five hours of release, which Fouts described as "flattering" as it would have required high interest.[36][37] A free demo was made available in October.[38] Fouts held a postmortem at the March 2012 Game Developers Conference.[24]

Serious Sam Double D XXL

Following the release, Fouts took a break before commencing work on an Xbox 360 port in December 2011. Mommy's Best Games and Devolver Digital agreed on features that would make such a port worth releasing, which Fouts subsequently developed, following the content specifications for the platform.[39] By March 2012, Fouts was deeply engaged in creating new game art for a "(sorta) secret project" relating to Double D.[40] Voice-over was added for all characters, with John Dick reprising his role as Sam.[41] For the cooperative multiplayer mode, Fouts initially considered adding a "Hologram Sam", based on one of the characters from the multiplayer modes of other Serious Sam games, as the second player character. He eventually agreed with Michael Dalmon, the actor from the trailers, to use his voice and likeness, adding his character to the game as Dan "Huff" Huffington, along with additional dialog between him and Sam.[33][41] To combat repetitiveness and adjust the game's pacing, Fouts created more levels that required less shooting, of which some used vehicles and others necessitated strategizing.[22][39] Some existing levels were slightly adjusted to suit the changes made to guns and ammunition.[42] He stated that many of the elements added were previously not included in the original game due to time constraints.[23] The expanded release was announced in May 2012 as Serious Sam Double D XXL with a projected release later that year.[43][44] The certification process for Xbox Live Arcade was completed in December 2012.[45]

In a two-part "Gun Diary" series of videos publicized between January and February 2013, Fouts explained the additions made to XXL.[46][47][48] By February, he lent most of his work time to marketing efforts for the game.[49] Ajanovic, Johnson and Rosenthal also worked on this version in their respective capacities.[20] A launch trailer was released alongside XXL.[50] Devolver Digital released the game through Xbox Live Arcade on February 20, 2013, co-publishing it with Mastertronic.[51][52] Mommy's Best Games held a launch event titled "Shave and a Haircut 8-Bit" in March in Louisville, Kentucky, and invited local game developers to showcase their work.[53] At the time, Fouts stated that XXL was likely to arrive on personal computers at some point.[39] In June 2013, he started porting the game to the platform, cleaning up hard-coded elements, and after a break continued development in September.[53] XXL was released on Steam on October 21, 2013, as a free update for existing owners of Double D, which remained playable separately.[53][54][55] The Serious Sam Collection, a physical compilation of Serious Sam games including XXL for Xbox 360, was released by Mastertronic and Maximum Games in July 2013.[56][57] The game was altered to run directly off the disc and without requiring a connection to the Xbox Live services, which was otherwise a requirement of XNA-based games. Fouts believed that this was the first time an XNA game had been distributed physically.[57] XXL continued to "sell well" through 2015, although sales had been declining.[58] The Xbox 360 version was delisted from Xbox Live Arcade shortly after Mastertronic filed for administration in November 2015.[59]

Reception

Serious Sam Double D received "mixed or average reviews", according to the review aggregator website Metacritic, which calculated a weighted average rating of 66/100 for the original version and one of 68/100 for XXL.[60] Jacob Siegal (VentureBeat) ranked it as the fourth-best indie game of 2011.[35] Several critics responded to using the gun stacker variously with joy, satisfaction, or a sense of empowerment.[1][3][6][7][9][14] Jim Sterling (Destructoid) called it "clever", saying that it added a "perfect level of freshness" to the Serious Sam formula, which Iain Farquhar (Bit-Tech) opined had been adapted faithfully. However, Sterling and Farquhar each cited a lack of depth in the mechanic, finding themselves using the same weapon combinations for most of the game.[10][14] Simon Parkin and Patrick Hancock, reviewing XXL for Eurogamer and Destructoid, respectively, considered Double D a good fit for the Serious Sam series, although Sterling believed that it would have limited appeal to players with no background knowledge of the series.[13][14][61]

Some reviewers criticized the game's repetitiveness, where Ozzie Mejia (Shacknews) specifically pointed out the commonality between bosses.[3][6][14] According to Rich Stanton (Eurogamer), the shooting in the game was "quantity over quality" and did not feel good enough to make up for its extensive usage.[7] Speaking of the upgrades introduced in XXL, Parkin said that they critically changed the game and its feel.[13] Stanton further disliked that explosions inflict self-harm and found little replay value.[12] Hancock noted a lack of a "meaningful" learning curve.[61] David Sanchez (GameZone) opined that the level design was "nicely varied",[15] although Parkin called it "scattershot and somewhat amateurish".[13] Charles Onyett (IGN) was entertained by the difficulty progression.[1] The change of pace posed by the puzzle sections was welcomed by Stanton and Adam Smith (Rock Paper Shotgun), of whom Stanton had wished that there were more.[3][7] Hancock labeled the unlockable challenges as "interesting" due to their limited arsenal, while Farquhar opined that they added little content beyond the campaign.[8][61] Furthermore, Hancock considered the head-to-head mode in XXL a "throwaway distraction".[61]

The writing received conflicting responses: Sterling called the humor "genuinely amusing",[14] Onyett characterized it as "childish" but found it fitting for the game's tone,[1] Sanchez described the writing as "pretty sharp and filled with genuine laugh-out-loud moments",[15] and Mejia expressed general enjoyment.[6] Conversely, Smith stated that the writing was bland, and the dialog unnecessary and "not amusing",[3] Killham felt that its jokes "generally fall flat",[9] and Hancock said that the humor was "very hit or miss, though it misses way more often".[61] Killham positively regarded the visual variety, while Stanton considered the animations "nice".[7][9] However, Stanton also labeled Double D as "not a great-looking game" and Hancock criticized the visuals as "bordering on generic".[7][61] Contrarily, Sanchez considered them "cool" and apt for the game.[15] Stanton praised the sound design as effective, while Hancock labeled the music as "generic".[7][61] Farquhar experienced "mushy and unresponsive" controls and input lag in Double D;[8] long loading times and occasional frame rate issues were reported for the Xbox 360 version of XXL by others.[9][61]

Notes

  1. ↑ Devolver Digital co-published the Xbox 360 version with Mastertronic.

References

  1. 1 2 3 4 5 6 Onyett, Charles (September 2, 2011). "Serious Sam: Double D Review". IGN. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  2. ↑ McElroy, Justin (March 16, 2011). "The most important thing about Serious Sam: Double D". Engadget. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  3. 1 2 3 4 5 Smith, Adam (September 8, 2011). "Wot I Think: Serious Sam: Double D". Rock Paper Shotgun. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  4. 1 2 3 Rosenberg, Adam (August 2, 2011). "This Game Lets You Bolt a Machine Gun to a Shotgun, top it with a Chainsaw and Add Another Machine Gun". Kotaku. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  5. 1 2 3 4 5 Conditt, Jessica (August 28, 2011). "The Joystiq Indie Pitch: Serious Sam: Double D". Engadget. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  6. 1 2 3 4 5 6 7 Mejia, Ozzie (August 30, 2011). "Serious Sam: Double D review". Shacknews. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  7. 1 2 3 4 5 6 7 8 9 Stanton, Rich (September 2, 2011). "Serious Sam Double D". Eurogamer. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  8. 1 2 3 4 5 Farquhar, Iain (August 31, 2011). "Serious Sam: Double D Review – Serious Sam: Double D PC Review". Bit-Tech. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  9. 1 2 3 4 5 6 7 8 Killham, Evan (February 18, 2013). "Serious Sam Double D XXL is an old-school concept full of newfangled ideas (review)". VentureBeat. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  10. 1 2 3 4 5 Farquhar, Iain (August 31, 2011). "Serious Sam: Double D Review – Serious Sam: Double D Review". Bit-Tech. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  11. 1 2 Walker, John (July 28, 2011). "Hands On: Serious Sam Double D". Rock Paper Shotgun. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  12. 1 2 3 Stanton, Rich (September 2, 2011). "Serious Sam Double D • Page 2". Eurogamer. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  13. 1 2 3 4 5 6 7 Parkin, Simon (February 18, 2013). "Serious Sam Double D XXL review". Eurogamer. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  14. 1 2 3 4 5 6 7 Sterling, Jim (October 9, 2011). "Review: Serious Sam: Double D". Destructoid. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  15. 1 2 3 4 Sanchez, David (February 18, 2013). "Review: Serious Sam Double D XXL is a gun-stacking, time-traveling, enemy-blasting good time". GameZone. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  16. 1 2 3 4 5 Garcia, Louis (April 28, 2011). "Interview Roundup: Croteam and indie developers discuss new titles in the Serious Sam universe". VentureBeat. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  17. ↑ Sanchez, David (February 15, 2013). "Interview: Serious Sam Double D XXL dev Nathan Fouts talks fire-breathing cats and pancake monsters". GameZone. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  18. ↑ Otero, Jose (January 31, 2012). "The Odyssey of Skulls of the Shogun". 1Up.com. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  19. ↑ Johnson, AJ (July 2011). "Serious Sam: Double D". 8 Bit Horse. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  20. 1 2 3 Fouts, Nathan. "Our Expertise". Mommy's Best Games. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
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  22. 1 2 3 Acevedo, Paul (September 8, 2012). "Xbox Live Developer Interview: Mommy's Best Games, maker of Shoot 1UP and Serious Sam Double D XXL". Windows Central. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
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  24. 1 2 3 4 5 6 7 Fouts, Nathan (March 9, 2012). Postmortem Microtalks. GDC Vault. San Francisco. Event occurs at 1:30–17:10. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  25. ↑ Dutton, Fred (March 9, 2011). "Indie devs hijack Serious Sam franchise". Eurogamer. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  26. ↑ Sinclair, Brendan (March 9, 2011). "Serious Sam goes indie". GameSpot. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  27. ↑ Fletcher, JC (March 9, 2011). "Serious Sam gets serious indie cred with new Indie Series". Engadget. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  28. ↑ O'Connor, Alice (March 9, 2011). "Serious Sam indie spin-offs announced". Shacknews. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  29. ↑ Goldman, Tom (June 11, 2011). "E3: Serious Sam: Double D". The Escapist. Archived from the original on October 29, 2019.
  30. ↑ Phillips, Tom (July 27, 2011). "Serious Sam Double D gameplay". Eurogamer. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  31. ↑ Hillier, Brenna (August 23, 2011). "Serious Sam Double D launch trailer is bananas". VG247. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  32. ↑ Phillips, Tom (August 31, 2011). "Serious Sam Double D launch trailer". Eurogamer. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  33. 1 2 Killham, Evan (November 8, 2014). "Mommy's Best Games boss talks barf, Gunstacking, and shakin' that rump (interview)". VentureBeat. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  34. ↑ Mitchell, Richard (August 22, 2011). "Serious Sam Double D stacking digital shelves (and guns) Aug. 30". Engadget. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  35. 1 2 Siegal, Jacob (December 24, 2011). "The best indie games of 2011". VentureBeat. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  36. ↑ Sinclair, Brendan (September 14, 2011). "Serious Sam: Double D dev makes plea to pirates". GameSpot. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  37. ↑ Fouts, Nathan (September 12, 2011). "Double DRM Free". Mommy's Best Games. Archived from the original on June 1, 2020. Retrieved May 31, 2020 – via Blogspot.
  38. ↑ Rossignol, Jim (October 5, 2011). "Serious Sam: Double D Single Demo!". Rock Paper Shotgun. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  39. 1 2 3 Mejia, Ozzie (February 5, 2013). "Serious Sam Double D XXL has 'high chance' of PC version". Shacknews. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  40. ↑ Fouts, Nathan (March 29, 2012). "Blackberry Pie Chart". Mommy's Best Games. Archived from the original on June 1, 2020. Retrieved May 31, 2020 – via Blogspot.
  41. 1 2 Johnson, AJ (December 2012). "Serious Sam: Double D XXL". 8 Bit Horse. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  42. ↑ Kaharl, Jonathan (August 23, 2020). "Serious Sam Spin-Offs (Part 1)". Hardcore Gaming 101. Archived from the original on June 21, 2023. Retrieved June 21, 2023.
  43. ↑ Hinkle, David (May 16, 2012). "Serious Sam 3: BFE, Serious Sam Double D XXL run screaming to XBLA this fall". Engadget. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  44. ↑ Conditt, Jessica (January 10, 2013). "Serious Sam Double D XXL storms XBLA on Feb. 20". Engadget. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  45. ↑ Fouts, Nathan (December 20, 2012). "XXL is Certifiable". Mommy's Best Games. Archived from the original on June 1, 2020. Retrieved May 31, 2020 – via Blogspot.
  46. ↑ Mitchell, Richard (January 31, 2013). "Serious Sam Double D XXL dev diary shows XBLA additions, stacks guns". Engadget. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  47. ↑ Sanchez, David (January 30, 2013). "Serious Sam Double D XXL 'Gun Diary 1' has crazy weapon stacking". GameZone. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  48. ↑ Farokhmanesh, Megan (February 12, 2013). "Serious Sam Double D XXL gun diary gives the lowdown on weapons". Polygon. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  49. ↑ Fouts, Nathan (February 6, 2013). "Apple Pie Chart". Mommy's Best Games. Archived from the original on June 1, 2020. Retrieved May 31, 2020 – via Blogspot.
  50. ↑ Tach, Dave (February 20, 2013). "Serious Sam Double D XXL trailer celebrates destruction, XBLA release". Polygon. Archived from the original on April 27, 2013. Retrieved May 31, 2020.
  51. ↑ O'Connor, Alice (January 10, 2013). "Serious Sam Double D XXL hitting XBLA in February with co-op". Shacknews. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  52. ↑ "Serious Sam Double D XXL Unleashes on Xbox LIVE Arcade". Devolver Digital. February 20, 2013. Archived from the original on August 6, 2014.
  53. 1 2 3 Fouts, Nathan (January 29, 2014). "Development Year in Review 2013". Mommy's Best Games. Archived from the original on June 1, 2020. Retrieved May 31, 2020 – via Blogspot.
  54. ↑ Hilliard, Kyle (October 22, 2013). "Serious Sam Double D Gets A Free XXL Upgrade On Steam". Game Informer. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  55. ↑ Fouts, Nathan (October 21, 2013). "Serious Sam Double D XXL on Steam". Mommy's Best Games. Archived from the original on June 1, 2020. Retrieved May 31, 2020 – via Blogspot.
  56. ↑ Gera, Emily (June 28, 2013). "Serious Sam Collection coming to Xbox 360 on July 12". Polygon. Archived from the original on July 25, 2015. Retrieved May 31, 2020.
  57. 1 2 Fouts, Nathan (August 1, 2013). "Ouch, We Slipped a Disc--". Mommy's Best Games. Archived from the original on June 1, 2020. Retrieved May 31, 2020 – via Blogspot.
  58. ↑ Fouts, Nathan (February 3, 2016). "Development Year in Review 2015". Mommy's Best Games. Archived from the original on June 1, 2020. Retrieved May 31, 2020 – via Blogspot.
  59. ↑ Walker, Richard (December 22, 2015). "Mastertronic Titles Delisted From Xbox Games Store". Xbox Achievements. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
  60. 1 2 3 "Serious Sam Double D". Metacritic. Archived from the original on September 14, 2023. Retrieved September 14, 2023.
  61. 1 2 3 4 5 6 7 8 9 Hancock, Patrick (February 18, 2013). "Review: Serious Sam Double D XXL". Destructoid. Archived from the original on June 1, 2020. Retrieved May 31, 2020.
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