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Steam

Alien Investigator

Also known as Alien Investigator, ai, alien investigator

Alien investigator is a 4 player online co-op horror game. Join a team of investigators and use all your alien expert equipment to gather as much evidence as you can. Learn extraterrestrial facts based on photos, videos and real life eyewitness accounts.

Last update
18 May 2026
Players now
0

Latest update

Announcement

Improvements in gameplay and difficulty.

Hello researchers! How is the search going? We are still working on the next big content patch, meanwhile we are listening to your opinions and these are the changes you can find in the new patch: -The movement speed of…

4 changesGameplayRead announcement

Update history

Browse past updates and patch notes for this game.

2 updates

Gallery

In-game media

Achievements

Community progression

Top picks from 9 Steam achievements, sorted by player unlock rates.

  • There's a Monster Outside My WindowFind your first alien completing an investigation.38.1%
  • There Are No CoincidencesVisit the cornfield farm22.1%
  • Senior investigatorReach investigator level 1010.1%
  • Hit 'Em Real HardComplete 20 investigations4.3%
  • Extreme radiationUpgrade your Geiger counter to the maximum level.3.2%
  • Master of dark lightUpgrade your ultraviolet light to the maximum level.2.6%