Games like Gravity Assist: Initiative
Games like Gravity Assist: Initiative include Among Us, Plague Inc: Evolved, Gang Beasts, Overcooked! 2, and Castle Crashers®. We matched them by the tags players give Gravity Assist: Initiative on Steam (Simulation, Artificial Intelligence, 2D, Space, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Among Us
Shared: Multiplayer · Space · 2D

Plague Inc: Evolved
Shared: Simulation · Multiplayer · Casual

Gang Beasts
Shared: Multiplayer · Co-op · Casual

Overcooked! 2
Shared: Multiplayer · Co-op · Casual

Castle Crashers®
Shared: 2D · Co-op · Multiplayer

The Escapists 2
Shared: Multiplayer · 2D · Simulation

Space Engineers
Shared: Simulation · Space · Multiplayer

Golf With Your Friends
Shared: Multiplayer · Casual · Co-op

Barotrauma
Shared: Multiplayer · Co-op · 2D

Don't Starve Together
Shared: Multiplayer · Co-op · 2D

Broforce
Shared: 2D · Co-op · Multiplayer

Stick Fight: The Game
Shared: Multiplayer · 2D · Local Multiplayer

BattleBlock Theater®
Shared: Co-op · Multiplayer · 2D

Stardew Valley
Shared: Multiplayer · Simulation · Co-op

Brawlhalla
Shared: Multiplayer · Casual · Co-op

Lovers in a Dangerous Spacetime
Shared: Multiplayer · Co-op · Space

Cosmoteer: Starship Architect & Commander
Shared: Space · 2D · Multiplayer

PICO PARK
Shared: Multiplayer · Co-op · Casual

Golf It!
Shared: Multiplayer · Casual · Simulation

Garry's Mod
Shared: Multiplayer · Casual · Simulation

Overcooked
Shared: Multiplayer · Local Co-Op · Co-op

BidKing
Shared: Simulation · Casual · Artificial Intelligence

Liars Bar
Shared: Multiplayer · Casual · PvP

STAR WARS™ Battlefront™ II
Shared: Multiplayer · Space · Co-op