Games like Heart attack
Games like Heart attack include Left 4 Dead 2, Resident Evil Village, Outlast, Dying Light, and Resident Evil Requiem. We matched them by the tags players give Heart attack on Steam (Action, Action RPG, Life Sim, Walking Simulator, and Hidden Object): closest matches first, and among equally close ones the better-known games.

Left 4 Dead 2
Shared: Action · FPS · First-Person

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

Outlast
Shared: First-Person · Horror · Action

Dying Light
Shared: Action · First-Person · Horror

Resident Evil Requiem
Shared: Action · FPS · First-Person

Apex Legends™
Shared: Action · FPS · First-Person

Ready or Not
Shared: FPS · Action · First-Person

35MM
Shared: Walking Simulator · FPS · Hidden Object

PUBG: BATTLEGROUNDS
Shared: Action · FPS · PvP

Escape the Backrooms
Shared: Horror · Psychological Horror · First-Person

Black Mesa
Shared: Action · FPS · First-Person

Call of Duty®
Shared: Action · FPS · First-Person

The Beast Inside
Shared: Action · First-Person · Horror

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

METRO 2033 Redux
Shared: Action · FPS · First-Person

Half-Life 2
Shared: Action · FPS · First-Person

BIGFOOT
Shared: Horror · FPS · Action

The Outlast Trials
Shared: Action · Horror · First-Person

Far Cry 3
Shared: Action · FPS · First-Person

Halo Infinite
Shared: Action · FPS · First-Person

METRO Last Light Redux
Shared: Action · FPS · First-Person

Grand Theft Auto V Legacy
Shared: Action · First-Person · Adventure

Battlefield™ 2042
Shared: Action · FPS · First-Person

Metro Exodus
Shared: Action · FPS · First-Person