- Alien: Covenant (2017)
R | Science fiction/Horror
- Alien 3 (1992)
R | Science fiction/Horror
- Annihilation (2018)
R | Science fiction/Thriller
- Aliens (1986)
R | Action/Science fiction
- A.I. Rising (2018)
R | Romance/Science fiction
- Area 51 (2015)
R | Science fiction/Horror
- Aliens: Special Edition (1999)
R | Action/Science fiction
- Alienator (1990)
R | Science fiction
- Alien Uprising (2013)
R | Science fiction
- Alien Resurrection (1997)
R | Science fiction/Horror
- Altitude (2010)
R | Science fiction/Horror
- Ash (2025)
R | Science fiction/Horror
- Aniara (2019)
R | Drama/Science fiction
- Alien Outpost (2015)
NR | Action/Science fiction
- The Anomaly (2014)
NR | Action/Science fiction
- Attack From Space (1965)
NR | Science fiction
- Area 407 (2011)
NR | Science fiction/Horror
- Almost Human (2014)
NR | Science fiction/Horror
- The Atomic Submarine (1959)
NR | Science fiction/Thriller
- Antiviral (2013)
NR | Science fiction/Horror
- Alien Planet
NR | Action/Science fiction
- The Alpha Test (2020)
NR | Science fiction
- AVH: Alien vs. Hunter (2007)
NR | Science fiction/Horror