Games like Kosmo Skirmish
Games like Kosmo Skirmish include Stick Fight: The Game, Rivals of Aether, Duck Game, Broforce, and Counter-Strike 2. We matched them by the tags players give Kosmo Skirmish on Steam (Action, Shooter, Arcade, Multiplayer, and Local Multiplayer): closest matches first, and among equally close ones the better-known games.

Stick Fight: The Game
Shared: Multiplayer · Action · PvP

Rivals of Aether
Shared: Multiplayer · 2D Fighter · Local Multiplayer

Duck Game
Shared: Multiplayer · Action · Local Multiplayer

Broforce
Shared: Action · Multiplayer · Shooter

Counter-Strike 2
Shared: Shooter · Action · Multiplayer

Brawlhalla
Shared: Multiplayer · Local Multiplayer · 2D Fighter

ROUNDS
Shared: Multiplayer · Local Multiplayer · Action

DRAGON BALL FighterZ
Shared: Action · Multiplayer · PvP

Street Fighter™ 6
Shared: Arcade · Action · PvP

TowerFall Ascension
Shared: Action · Local Multiplayer · 2D Fighter

Tom Clancy's Rainbow Six Siege
Shared: PvP · Shooter · Multiplayer

PUBG: BATTLEGROUNDS
Shared: Shooter · PvP · Multiplayer

Move or Die
Shared: Action · Multiplayer · Local Multiplayer

SpeedRunners
Shared: Multiplayer · Local Multiplayer · Action

TEKKEN 7
Shared: Action · Multiplayer · Arcade

Rivals of Aether II
Shared: Multiplayer · Action · Local Multiplayer

GUILTY GEAR -STRIVE-
Shared: PvP · Arcade · 2D Fighter

Pixel Gun 3D: PC Edition
Shared: PvP · Shooter · Multiplayer

Apex Legends™
Shared: Multiplayer · Shooter · PvP

TEKKEN 8
Shared: Action · PvP · Multiplayer

Paladins®
Shared: Shooter · Multiplayer · Action

Ultra Street Fighter® IV
Shared: Arcade · Action · Local Multiplayer

Bopl Battle
Shared: Action · Multiplayer · 4 Player Local

Battlefield™ 2042
Shared: Shooter · Multiplayer · Action