Games like Instant Anastasia
Games like Instant Anastasia include Resident Evil Requiem, Gunfire Reborn, Hades, Half-Life 2, and Black Mesa. We matched them by the tags players give Instant Anastasia on Steam (Action, Action-Adventure, Action Roguelike, FPS, and Roguelite): closest matches first, and among equally close ones the better-known games.

Resident Evil Requiem
Shared: Action · FPS · Survival Horror

Gunfire Reborn
Shared: Roguelite · FPS · Action

Hades
Shared: Action Roguelike · Roguelite · Action

Half-Life 2
Shared: Action · FPS · Sci-fi

Black Mesa
Shared: Action · FPS · First-Person

Titanfall® 2
Shared: FPS · Action · Sci-fi

SULFUR
Shared: Action Roguelike · FPS · Roguelite

Roboquest
Shared: Action Roguelike · FPS · Roguelite

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

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Roguelite

Phantom Abyss
Shared: Action · Action Roguelike · Action-Adventure

Megabonk
Shared: Action Roguelike · Roguelite · Action

Bright Memory: Infinite
Shared: Action · FPS · Sci-fi

Atomic Heart
Shared: Action · FPS · Action-Adventure

BioShock Infinite
Shared: Action · FPS · First-Person

Ziggurat
Shared: Action · Roguelite · FPS

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

Half-Life
Shared: FPS · Action · Sci-fi

Starship Troopers: Extermination
Shared: Action · FPS · First-Person

DOOM
Shared: Action · FPS · First-Person

Deep Rock Galactic: Rogue Core
Shared: FPS · Action Roguelike · Roguelite

Choo-Choo Charles
Shared: Survival Horror · First-Person · Action-Adventure

Far Cry® 5
Shared: Action-Adventure · FPS · Action

Far Cry® 6
Shared: Action-Adventure · FPS · Action