| Alien Nations (1999) | 5,393,794 | 836 |
| Alien Odyssey (1995) | 49,255 | 43 |
| Alien Olympics 2044 AD (1992) | 291,243 | 87 |
| Alien on the Radar (2023) | 2 | 2 |
| Alien Outbreak 2: Invasion (2005) | 27,512 | 55 |
| Alien Paradise (2024) | 75,598 | 20 |
| Alien Rage (2013) | 4,570,555 | 3,535 |
| Alien Raiders (1981) | 428,486 | 38 |
| Alien Rampage (1996) | 288,693 | 117 |
| Alien Removal Division (2022) | 317,808 | 249 |
| Alien Robot Monsters (2015) | 10,538 | 28 |
| Alien Scumbags (2020) | 33,587 | 158 |
| Alien Shooter (2003) | 26,756,234 | 23,148 |
| Alien Shooter 2: Reloaded (2009) | 3,513,483 | 1,757 |
| Alien Shooter TD (2017) | 616,164 | 620 |
| Alien Shooter: Revisited (2009) | 460,787 | 232 |
| Alien Shooter: Vengeance (2006) | 497,819 | 479 |
| Alien Sky (2004) | 869,631 | 321 |
| Alien Slayers (2023) | 298,063 | 201 |
| Alien Soldier (1995) | 7,064,225 | 2,267 |
| Alien Space Bastards (2022) | 398 | 3 |
| Alien Spidy (2013) | 218,018 | 280 |
| Alien Stars (2005) | 1,814,275 | 236 |
| Alien Storm (1990) | 4,736,239 | 3,303 |
| Alien Swarm (2010) | 148,781,754 | 8,336 |
| Alien Syndrome (1986) | 2,375,641 | 1,460 |
| Alien Syndrome (2007) | 1,602,043 | 371 |
| Alien Trilogy (1996) | 6,138,484 | 3,115 |
| Alien Video Game Scientist (2024) | 0 | 0 |
| Alien Virus (1995) | 3,211,419 | 107 |
| Alien vs Predator (1994) | 10,150,931 | 433 |
| Alien vs Predator: The Last of His Clan (1993) | 8,435 | 34 |
| Alien vs. Predator (1993) | 4,600,289 | 1,160 |
| Alien vs. Predator (1994) | 5,273,784 | 1,973 |
| Alien vs. Predator (2004) | 322,137 | 83 |
| Alien vs. Predator 2 2D: Requiem (2007) | 2,152 | 7 |
| Alien vs. Predator 3D (2005) | 57,770 | 24 |
| Alien vs. Predator: The Last of His Clan (1993) | 39,662 | 53 |
| Alien World Millionaire (2020) | 0 | 0 |
| Alien Zombie Death (2010) | 67,930 | 56 |
| Alien Zombie Megadeath (2011) | 209,521 | 32 |
| Alien's Return (1983) | 1,108,457 | 56 |
| Alien: Blackout (2019) | 18,832,318 | 1,659 |
| Alien: Isolation (2014) | 1,168,292,111 | 268,311 |
| Alien: Resurrection (2000) | 48,651,618 | 2,399 |
| Alien: Rogue Incursion (2024) | 9,972,973 | 3,238 |
| Alienation (2016) | 6,831,593 | 8,228 |
| Alienators: Evolution Continues (2001) | 44,546 | 83 |
| Alienautics (2020) | 0 | 0 |
| Aliens (1982) | 10,436,205 | 484 |
| Aliens (1990) | 2,847,914 | 847 |
| Aliens (2021) | 12,113,040 | 582 |
| Aliens After Ava (2023) | 21,418 | 71 |
| Aliens Drive Me Crazy (2014) | 1,533,550 | 880 |
| Aliens in the Attic (2009) | 1,553,958 | 296 |
| Aliens Infestation (2011) | 272,400 | 186 |
| ALIENS INVADED OUR PLANET (2018) | 14,140 | 10 |
| Aliens Online (1998) | 40,443 | 26 |
| Aliens Strike (2021) | 364,986 | 77 |
| Aliens Versus Predator (1999) | 10,702,544 | 2,675 |
| Aliens Versus Predator 2 (2001) | 11,466,606 | 2,477 |
| Aliens versus Predator 2: Primal Hunt (2002) | 1,627,939 | 239 |
| Aliens versus Predator: Extinction (2003) | 4,014,140 | 1,336 |
| Aliens vs. Predator (2010) | 489,460,275 | 36,569 |
| Aliens vs. Predator: Requiem (2007) | 25,608,155 | 1,205 |
| Aliens: A Comic Book Adventure (1995) | 34,187 | 47 |
| Aliens: Colonial Marines (2013) | 140,673,330 | 23,781 |
| Aliens: Dark Descent (2023) | 78,968,169 | 27,063 |
| Aliens: Extermination (2006) | 2,432,170 | 455 |
| Aliens: Fireteam Elite (2021) | 95,805,000 | 71,270 |
| Aliens: Infestation (2011) | 2,793,932 | 596 |
| Aliens: Thanatos Encounter (2001) | 66,022 | 73 |
| Aliens: The Computer Game (1986) | 453,433 | 151 |
| Aliens: The Roguelike (2007) | 29,358 | 54 |
| Alienzix (2017) | 0 | 0 |
