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Serious Sam: Double D is a shoot 'em up side-scrolling shooter video game developed by Mommy's Best Games and published by Devolver Digital. The original version of the game was released for Microsoft Windows on August 30, 2011. developing studio kept on working on the game, and on February 20, 2013, the game was released as Serious Sam: Double D: XXL for the Xbox 360 on the Xbox Live Arcade, integrating more weapons, more enemies, and the long-awaited co-op mode.

On October 21, 2013, Serious Sam Double D: XXL was released as a free patch for Serious Sam Double D for Microsoft Windows.


Serious Sam is teleported back to Ancient Egypt. Apparently, Sam has been sent back to Egypt to investigate a strange beacon that has been discovered. However, Sam soon stumbles upon Mental's forces, which makes NETRICSA a bit suspicious, as she believes that Sam has defeated Mental. It turns out later that it was actually a farce; Sam took a vacation and shut down NETRICSA during it, then reactivated her when he was done, saying he had killed Mental. Sam then travels through a pyramid and finds the Jump Pad in it. After clearing out the pyramid of monsters, Sam exits the pyramid from the opposite side he came from. Soon after, he is attacked by the Chimputee Battle Master.

After Sam kills the Battle Master, a strange green crystal appears from its body. Sam and NETRICSA determine that the crystal is actually the beacon they were sent to investigate. Since it came from one of Mental's forces, Sam decides to destroy it.

Later, Sam is teleported to Nova Scotia in Canada, during the Jurassic period. Mental's forces are in this time period as well, showing that his scheme wasn't stopped by destroying the crystal beacon in Egypt. After traveling through and fighting them, Sam encounters the Female Bio-mechanoid. Once its dead, another crystal beacon appears. However, after he destroys it, Sam is not teleported. This seems a bit suspicious, so he continues to travel through Nova Scotia to see what's going on. Eventually, Sam is confronted by Mental's Pet Hamster. This creature attacks Sam, so he kills it. After killing the beast, another crystal beacon appears. Sam destroys it, as usual.

With the destruction of the third beacon, Sam is teleported to Pompeii in 79 A.D., a few minutes before Mount Vesuvius erupts. As with Nova Scotia, Mental's forces are here, showing he is planning something in the region. Sam manages to fight through some of Mental's forces, but then the volcano starts erupting. Sam is able to dodge the initial fireballs thanks to some Giant Fleas, but instead decides to seek shelter in the most logical location; the volcano itself. He somehow manages to survive entering it, but notices something suspicious about it; the inner part of the volcano has a lot of scaffolding in it and a large machine in the center. After some discussion, NETRISCA and Sam come to the conclusion that Mental is using the active volcano as a power source for some evil scheme. Sam decides to tear through the forces in the volcano and escape through the other side.

After escaping the volcano, Sam manages to enter another part of Pompeii which has not been hit by the volcano yet. When he reaches the surface again, General Maxilla, the leader of Mental's forces, taunts him over a loudspeaker, then reveals that he wants Sam dead quickly so that he can watch a rerun of a TV show he really likes. He ends his threat telling Sam that he will fight him one-on-one if Sam gets to him. When he's done, Sam travels through Pompeii, but discovers that the way to General Maxilla is filled with powerful monsters such as Caterfighters. Sam slaughters every creature that Maxilla has placed in his way and goes to fight the General.

Sam finally reaches Maxilla, who keeps his promise to fight Sam. However, he is completely pathetic in battle, and is quickly killed before he can attack Sam. In his dying breath, he summons Double Diva in order to kill Sam. Despite Double Diva's size, Sam kills her. When she dies, the final crystal beacon appears. After destroying it, the game ends, as Sam has managed to defeat Mental's forces again and stop whatever scheme he was planning with the crystal beacons.




  • 0-4377 Flamethrower: This weapon fires a stream of fire that can inflict a good amount of damage when it hits a target and will set the target on fire, doing even more damage.
  • 12 Gauge Shotgun: A pump-action shotgun that fires a tight spread of bullets when the fire key is pressed. Each pellet does a decent amount of damage, but if most of the pellets connect, it can deal a high amount of damage per shot. It is the only shotgun in the game.
  • Insane-brand Chainsaw: A chainsaw that resembles the P-LAH Chainsaw in appearance. The weapon does a medium amount of damage per slice, but has unlimited ammunition.
  • LM32 Rocket Launcher: The LM32 fires a rocket straight ahead when the fire key is pressed. When the rocket hits something, it will explode, damaging anything near the impact site.
  • MadDog Grenade Launcher: A weapon that fires bouncy grenades. These grenades will explode either when they hit an enemy or after a few seconds.
  • Thompson submachine gun: Fully automatic submachine gun.
  • Type II Machine Pistol: An automatic submachine gun machine with a rather low damage output.
  • XL4 Lasergun: The XL4 fires two green lasers that are very close to each other, dealing high damage to targets.


Serious Sam: Double D is a 2D side-scroller based on the Serious Sam games. It features the same gameplay in the 3D games; the player must reach the end of a level while fighting off hordes of enemies. Ammo, armor and health items are scattered throughout the level in order to give the player a boost when they need it. However, there is no point system, so the player just kills enemies for survival's sake.

The game is divided into three chapters, with a boss at the end of each one. There are also a boss or two in the middle of the second chapter in order to keep the player on their toes.

Secrets are in this game as well, but often have important items for the player, such as extra weapons. Some Easter Eggs and game references also appear in secrets.

The biggest feature of the game is the Gunstack system. This system lets the player stack any gun on top of each other, with up to six guns on each gunstack. By stacking certain weapons, the player can create powerful combinations, such as a set featuring rocket launchers and grenade launchers for defeating enemies with a lot of health, or add a chainsaw near the bottom of a stack in order to deal with enemies that get too close to the player. However, the player needs to collect weapons and Gunstack Connectors in order to get more weapons and connectors to attach more weapons.

There is also another item called the Jump Pad. This lets the player reach higher areas than they could by jumping normally. They can also be placed on the sides of walls in order to "wall jump" to secret areas. It is often used to find secrets.

Another new feature is that the corpses of enemies can be walked on after being killed. The player can use this to their advantage, such as escape pits from the sheer amount of enemies that have been killed, use a large enemy's body as a way to reach a platform they otherwise couldn't reach, or even use dead bodies as a bridge over deadly spikes.

The last feature is the Golden Gun system. When the final boss has been defeated, the player will be given a "golden" version of the weapon they dealt the most damage with in the game. A golden version of a weapon doubles its size and amount of damage it does per shot and gives it unlimited ammunition. After the first golden gun is unlocked, the player is able to unlock golden versions of every other weapon by dealing a certain amount of damage with them.


Serious Sam: Double D can only be played in singleplayer. However, the player can go through either a single player campaign or try several challenges, where the goal is to do things such as kill enough enemies or survive for a certain amount of time. The player's highest score is saved. Weapons from the challenges are pre-set, but the damage from them counts towards the damage needed to unlock the golden version of a gun.


Serious Sam: Double D was developed by Mommy's Best Games, an indie game studio based in Charlestown, Indiana.[1][2] Their first game, Weapon of Choice, was discovered by Devolver Digital, who contacted Nathan Fouts (the founder of the company) in order to create a game for their Serious Sam indie series in order to promote Serious Sam 3: BFE. After some brainstorming, Mommy's Best Games came up with the gunstack concept and submitted it to Croteam to see if it would fit the Serious Sam series. The idea received a positive outcome, and gave them the approval to start working on what would become Serious Sam: Double D.

A teaser for Serious Sam: Double D was posted on Mommy's Best Game's Facebook page in the middle of February. Soon after, the Serious Sam indie series was announced by Devolver Digital in March 2011.[3]


Serious Sam: Double D received mixed reviews from game critics. Metacritic gave the game a normalized rating of 66/100 for the original version, and 68/100 for Serious Sam: Double D: XXL.[4][5] Jacob Siegel from VentureBeat ranked it as the fourth-best indie game of 2011.[6] A few critics praised the game for its gun stacker system.[7]. Other aspects of the game, such as the level design, visual effects, writing, and music, received conflicting opinions, while the game itself was criticized for its repetitiveness and a few technical issues that were found.[8][9][10]

Behind the scenes[]

  • Soundtrack from Mommy's Best Games' previous games can be found in the game's files. These are most likely leftovers.



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