Super Shotgun is a multiple aliens mod for the campaign portion of Alien: Isolation. The mod makes the following changes to the base game:

  • New intro video.
  • New main menu title logo.
  • Shotgun has infinite ammo. 
  • Shotgun kills all non-alien enemies with a single shot and ignites them.
  • Shotgun causes the alien to retreat.
  • Shotgun sends human enemies flying away.
  • All non-shotgun weapons have no ammo nor can any be looted.
  • All offensive items are restricted: pipe bombs, molotovs, EMPs and flashbangs.
  • An in-game cutscene in Mission 4 was removed to prevent a possible softlock.
  • Four aliens in Mission 4.
  • Four aliens in Mission 5.
  • Five aliens in Mission 6.
  • Four aliens in Mission 7.
  • Four aliens in the Lorenz portion of Mission 10.
  • Three aliens in the Gemini portion of Mission 10.
  • Three aliens in the KG348 portion of Mission 10.
  • Three aliens in the nest portion of Mission 14.
  • Numerous facehuggers in the Anesidora portion of Mission 15.
  • Five aliens in Mission 16.
  • Four aliens in Mission 17.
  • Four aliens in the first area of Mission 18.
  • Mission 9 is significantly shortened. 
  • Amanda can run during the spacewalk portion of Mission 16.
  • Amanda can run during the spacewalk portion of Mission 18.

To install this mod, follow these steps:

1. Open the Step 1 folder and extract the DATA folder into "Program Files (x86)\Steam\steamapps\common\Alien Isolation." Overwrite the files when prompted.

2. Open the Step 2 folder and select the difficulty you are going to be playing on. Now extract the SHOTGUN_NORMAL.BML file into "Program Files (x86)\Steam\steamapps\common\Alien Isolation\DATA\WEAPON_INFO\AMMO." Overwrite the old SHOTGUN_NORMAL.BML file when prompted.

3. Open the Step 3 folder and select the difficulty you are going to be playing on. Now extract the CHSV00.AIS and CHSV01.AIS files into "Program Files (x86)\Steam\userdata\*Your Steam ID*\214490\remote". Overwrite the old save files when prompted.

4. Launch the game and select Continue Game. You will begin in Mission 3 with a shotgun and all of the loot from the first two missions. The game must be played from this point forward. 

NOTE: If you change the difficulty at any time during your playthrough, you must repeat step 2 above and install the correct shotgun data for the new difficulty.

To uninstall the mod and return your game to normal, simply right click on Alien: Isolation in your Steam library and select properties, then go to the local files tab and click on verify integrity of game files. Steam will now redownload the necessary files to restore your game to the vanilla version. Please note that you must also restart the game from the beginning in order to no longer have extra aliens, as the extra aliens are now tied to the mission saves you created while playing the mod.

Credits: 

Darkstar - PAK edits, BML edits, and title logo.
Jeff Cat - PAK edits.
Matt Filer - Creator of the mod tools used.
Creative Assembly/SEGA - Original PAKs and BMLs.