| Alien Removal Division (2022) | 317,961 | 253 |
| Alien Robot Monsters (2015) | 40,063 | 33 |
| Alien Scumbags (2020) | 33,640 | 160 |
| Alien Shooter (2003) | 27,573,349 | 23,749 |
| Alien Shooter 2: Reloaded (2009) | 3,533,991 | 1,861 |
| Alien Shooter TD (2017) | 616,571 | 626 |
| Alien Shooter: Revisited (2009) | 462,568 | 252 |
| Alien Shooter: Vengeance (2006) | 555,079 | 483 |
| Alien Sky (2004) | 874,311 | 336 |
| Alien Slayers (2023) | 336,258 | 210 |
| Alien Soldier (1995) | 7,143,986 | 2,418 |
| Alien Space Bastards (2022) | 398 | 4 |
| Alien Spidy (2013) | 220,263 | 286 |
| Alien Stars (2005) | 1,904,961 | 243 |
| Alien Storm (1990) | 5,148,949 | 3,587 |
| Alien Swarm (2010) | 166,680,173 | 8,634 |
| Alien Syndrome (1986) | 2,420,896 | 1,569 |
| Alien Syndrome (2007) | 1,627,144 | 406 |
| Alien Trilogy (1996) | 6,199,673 | 3,359 |
| Alien Video Game Scientist (2024) | 0 | 0 |
| Alien Virus (1995) | 3,269,234 | 120 |
| Alien vs Predator (1994) | 10,157,964 | 447 |
| Alien vs Predator: The Last of His Clan (1993) | 11,367 | 37 |
| Alien vs. Predator (1993) | 4,778,518 | 1,285 |
| Alien vs. Predator (1994) | 5,394,037 | 2,076 |
| Alien vs. Predator (2004) | 322,171 | 86 |
| Alien vs. Predator 2 2D: Requiem (2007) | 2,160 | 7 |
| Alien vs. Predator 3D (2005) | 58,128 | 25 |
| Alien vs. Predator: The Last of His Clan (1993) | 40,040 | 58 |
| Alien World Millionaire (2020) | 0 | 0 |
| Alien Zombie Death (2010) | 68,255 | 57 |
| Alien Zombie Megadeath (2011) | 209,525 | 32 |
| Alien's Return (1983) | 1,138,022 | 68 |
| Alien: Blackout (2019) | 18,839,530 | 1,674 |
| Alien: Isolation (2014) | 1,199,553,042 | 283,450 |
| Alien: Resurrection (2000) | 49,097,103 | 2,564 |
| Alien: Rogue Incursion (2024) | 19,155,459 | 7,297 |
| Alienation (2016) | 6,926,585 | 8,314 |
| Alienators: Evolution Continues (2001) | 45,672 | 93 |
| Alienautics (2020) | 0 | 0 |
| Aliens (1982) | 10,437,234 | 491 |
| Aliens (1990) | 2,887,558 | 862 |
| Aliens (2021) | 12,118,192 | 585 |
| Aliens After Ava (2023) | 21,432 | 75 |
| Aliens Drive Me Crazy (2014) | 1,534,449 | 921 |
| Aliens in the Attic (2009) | 1,572,194 | 303 |
| Aliens Infestation (2011) | 274,357 | 192 |
| ALIENS INVADED OUR PLANET (2018) | 14,140 | 10 |
| Aliens Online (1998) | 40,557 | 28 |
| Aliens Strike (2021) | 364,997 | 78 |
| Aliens Versus Predator (1999) | 10,823,892 | 2,762 |
| Aliens Versus Predator 2 (2001) | 11,756,729 | 2,613 |
| Aliens versus Predator 2: Primal Hunt (2002) | 1,628,378 | 250 |
| Aliens versus Predator: Extinction (2003) | 4,070,926 | 1,368 |
| Aliens vs. Predator (2010) | 491,508,424 | 38,436 |
| Aliens vs. Predator: Requiem (2007) | 26,409,557 | 1,340 |
| Aliens: A Comic Book Adventure (1995) | 34,498 | 54 |
| Aliens: Colonial Marines (2013) | 142,812,512 | 24,569 |
| Aliens: Dark Descent (2023) | 79,410,688 | 29,289 |
| Aliens: Extermination (2006) | 2,468,477 | 508 |
| Aliens: Fireteam Elite (2021) | 101,149,378 | 74,257 |
| Aliens: Infestation (2011) | 2,939,846 | 666 |
| Aliens: Thanatos Encounter (2001) | 67,232 | 77 |
| Aliens: The Computer Game (1986) | 454,614 | 158 |
| Aliens: The Roguelike (2007) | 29,382 | 54 |
| Alienzix (2017) | 151 | 1 |
| Alimardan's Mischief (2017) | 0 | 0 |
| Alimardan's Mischiefs (2011) | 39,476 | 11 |
| Alina of the Arena (2022) | 1,888,093 | 1,319 |
| Aliosso (2026) | 0 | 0 |
| Alisa (2021) | 22,835,061 | 1,714 |
| Alisa Quest (2020) | 19,509 | 9 |
| Alisia Dragoon (1992) | 2,091,249 | 1,320 |
| Alister In Wonderland (2024) | 0 | 0 |
| Alive 4-Ever (2009) | 124,051 | 14 |
