Games like OrbWars
Games like OrbWars include Overcooked! 2, The Binding of Isaac: Rebirth, Vampire Survivors, Enter the Gungeon, and Brotato. We matched them by the tags players give OrbWars on Steam (Roguelike, Action Roguelike, Local Co-Op, Casual, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

Overcooked! 2
Shared: Local Co-Op · Co-op · Casual

The Binding of Isaac: Rebirth
Shared: Roguelike · Action Roguelike · Local Co-Op

Vampire Survivors
Shared: Action Roguelike · Roguelike · Casual

Enter the Gungeon
Shared: Action Roguelike · Roguelike · Local Co-Op

Brotato
Shared: Roguelike · Action Roguelike · Local Co-Op

Wizard of Legend
Shared: Action Roguelike · Roguelike · Local Co-Op

Barony
Shared: Roguelike · Action Roguelike · Local Co-Op

Risk of Rain 2
Shared: Action Roguelike · Roguelike · Co-op

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

Crab Champions
Shared: Action Roguelike · Roguelike · Co-op

Brawlhalla
Shared: Casual · Local Multiplayer · Co-op

Gang Beasts
Shared: Co-op · Casual · Local Multiplayer

Ship of Fools
Shared: Local Co-Op · Action Roguelike · Co-op

Juicy Realm
Shared: Action Roguelike · Roguelike · Casual

PlateUp!
Shared: Co-op · Local Co-Op · Roguelike

Crawl
Shared: Action Roguelike · Local Co-Op · Local Multiplayer

Risk of Rain (2013)
Shared: Roguelike · Action Roguelike · Co-op

Blazing Beaks
Shared: Roguelike · Action Roguelike · Local Co-Op

Megabonk
Shared: Action Roguelike · Roguelike · Indie

Lost Castle
Shared: Action Roguelike · 4 Player Local · Roguelike

Spelunky
Shared: Roguelike · Action Roguelike · Local Co-Op

Ravenswatch
Shared: Roguelike · Action Roguelike · Co-op

Rabbit and Steel
Shared: Action Roguelike · Co-op · Roguelike

Risk of Rain Returns
Shared: Action Roguelike · Local Co-Op · Roguelike