| Alien Odyssey (1995) | 51,814 | 52 |
| Alien Olympics 2044 AD (1992) | 295,039 | 95 |
| Alien on the Radar (2023) | 2 | 2 |
| Alien Outbreak 2: Invasion (2005) | 27,628 | 56 |
| Alien Paradise (2024) | 75,623 | 21 |
| Alien Rage (2013) | 4,578,809 | 3,606 |
| Alien Raiders (1981) | 482,012 | 43 |
| Alien Rampage (1996) | 303,535 | 134 |
| Alien Removal Division (2022) | 317,961 | 253 |
| Alien Robot Monsters (2015) | 40,063 | 33 |
| Alien Scumbags (2020) | 33,640 | 160 |
| Alien Shooter (2003) | 27,573,400 | 23,750 |
| 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) | 874,362 | 336 |
| Alien Slayers (2023) | 336,367 | 211 |
| Alien Soldier (1995) | 7,145,439 | 2,422 |
| 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) | 166,680,184 | 8,635 |
| Alien Syndrome (1986) | 2,420,992 | 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) | 3,775,801 | 122 |
| Alien vs Predator (1994) | 10,157,964 | 447 |
| Alien vs Predator: The Last of His Clan (1993) | 11,367 | 37 |
| Alien vs. Predator (1993) | 4,780,126 | 1,288 |
| 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) | 1,199,575,059 | 283,498 |
| Alien: Resurrection (2000) | 49,122,008 | 2,566 |
| Alien: Rogue Incursion (2024) | 19,155,460 | 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) | 1,572,336 | 304 |
| 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) | 491,511,523 | 38,439 |
| Aliens vs. Predator: Requiem (2007) | 26,410,999 | 1,341 |
| Aliens: A Comic Book Adventure (1995) | 34,498 | 54 |
| Aliens: Colonial Marines (2013) | 142,812,512 | 24,569 |
| Aliens: Dark Descent (2023) | 79,411,007 | 29,289 |
| Aliens: Extermination (2006) | 2,468,477 | 508 |
| Aliens: Fireteam Elite (2021) | 101,191,289 | 74,271 |
| 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 |
