Games like Last Signal
Games like Last Signal include Outlast, Resident Evil Village, Ready or Not, Half-Life 2, and Poppy Playtime. We matched them by the tags players give Last Signal on Steam (Psychological Horror, Action, Horror, Adventure, and FPS): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Psychological Horror · Atmospheric

Resident Evil Village
Shared: Horror · Action · First-Person

Ready or Not
Shared: FPS · Horror · Psychological Horror

Half-Life 2
Shared: Action · FPS · Adventure

Poppy Playtime
Shared: Horror · Psychological Horror · First-Person

Black Mesa
Shared: Action · FPS · First-Person

METRO 2033 Redux
Shared: FPS · Horror · Action

Resident Evil 7 Biohazard
Shared: Horror · Psychological Horror · First-Person

Half-Life: Alyx
Shared: Horror · FPS · Action

Resident Evil Requiem
Shared: Horror · Action · FPS

Metro Exodus
Shared: FPS · Action · Horror

Metro 2033
Shared: Action · FPS · Horror

METRO Last Light Redux
Shared: Action · FPS · Horror

BioShock Infinite
Shared: Action · FPS · First-Person

MiSide
Shared: Psychological Horror · Horror · First-Person

Outlast 2
Shared: Psychological Horror · Horror · First-Person

Left 4 Dead 2
Shared: FPS · Action · Zombies

F.E.A.R.
Shared: Horror · Action · FPS

BioShock™ Remastered
Shared: FPS · Horror · Atmospheric

Little Nightmares II
Shared: Horror · Adventure · Psychological Horror

Alan Wake
Shared: Action · Horror · Adventure

BioShock™
Shared: Action · FPS · Atmospheric

Call of Duty®: Black Ops III
Shared: Action · FPS · Zombies

SOMA
Shared: Psychological Horror · Horror · Atmospheric