Games like BioFusion
Games like BioFusion include Age of Darkness: Final Stand, Deep Rock Galactic, PUBG: BATTLEGROUNDS, Sanctum 2, and Squad. We matched them by the tags players give BioFusion on Steam (Action RTS, FPS, Tower Defense, PvE, and Strategy): closest matches first, and among equally close ones the better-known games.

Age of Darkness: Final Stand
Shared: Action RTS · Tower Defense · Strategy

Deep Rock Galactic
Shared: FPS · PvE · Shooter

PUBG: BATTLEGROUNDS
Shared: FPS · Shooter · Action

Sanctum 2
Shared: FPS · Tower Defense · Strategy

Squad
Shared: FPS · PvE · Shooter

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

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

Black Mesa
Shared: FPS · First-Person · Action

Half-Life 2
Shared: FPS · Action · Shooter

Half-Life: Alyx
Shared: FPS · VR · Shooter

Counter-Strike: Source
Shared: FPS · Shooter · Action

Aimlabs
Shared: FPS · Shooter · First-Person

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

Paladins®
Shared: FPS · Shooter · First-Person

Halo Infinite
Shared: FPS · Shooter · First-Person

BioShock Infinite
Shared: FPS · Shooter · First-Person

Natural Selection 2
Shared: FPS · Strategy · RTS

DOOM
Shared: FPS · Shooter · Action

Destiny 2
Shared: FPS · PvE · Shooter

Bodycam
Shared: FPS · Shooter · First-Person

Cosmic Trip
Shared: FPS · Action RTS · Tower Defense

PAYDAY 2
Shared: FPS · Action · Shooter

Titanfall® 2
Shared: FPS · Shooter · First-Person

Silica
Shared: FPS · RTS · Strategy