Games like Grease Trap '99
Games like Grease Trap '99 include SchoolBoy Runaway, Poppy Playtime, MiSide, The Room 4: Old Sins, and Amnesia: The Dark Descent. We matched them by the tags players give Grease Trap '99 on Steam (Horror, Shop Keeper, Puzzle, Life Sim, and Adventure): closest matches first, and among equally close ones the better-known games.
SchoolBoy Runaway
Shared: Puzzle · Horror · Adventure
Poppy Playtime
Shared: Horror · Puzzle · First-Person
MiSide
Shared: Horror · First-Person · 3D
The Room 4: Old Sins
Shared: Puzzle · Adventure · Lovecraftian
Amnesia: The Dark Descent
Shared: Horror · Puzzle · First-Person
The Room Two
Shared: Puzzle · Horror · Adventure
Killer Frequency
Shared: Horror · Puzzle · Adventure
Little Nightmares II
Shared: Horror · Puzzle · Adventure
Summon
Shared: Horror · Puzzle · Life Sim
Bendy and the Dark Revival
Shared: Horror · Adventure · First-Person
Bendy and the Ink Machine
Shared: Horror · Puzzle · First-Person
Little Nightmares
Shared: Horror · Adventure · Puzzle
Amnesia: Rebirth
Shared: Puzzle · Horror · First-Person
Inside the Backrooms
Shared: Horror · Puzzle · Adventure
The Forest
Shared: Horror · Adventure · First-Person
Amanda the Adventurer
Shared: Horror · Puzzle · First-Person
Garten of Banban
Shared: Horror · Puzzle · First-Person
The Room Three
Shared: Puzzle · Adventure · Horror
The Room
Shared: Puzzle · Adventure · Horror
Scorn
Shared: Horror · Puzzle · First-Person
Five Nights at Freddy's: Security Breach
Shared: Horror · First-Person · Adventure
Five Nights at Freddy's: Secret of the Mimic
Shared: Horror · Adventure · First-Person
MOLE
Shared: Horror · Puzzle · Adventure
Outlast
Shared: Horror · First-Person · Adventure