Games like DDNet
Games like DDNet include Dota 2, Geometry Dash, Celeste, Brawlhalla, and Super Meat Boy. We matched them by the tags players give DDNet on Steam (Difficult, Online Co-Op, Precision Platformer, Free to Play, and 2D Platformer): closest matches first, and among equally close ones the better-known games.
Dota 2
Shared: Free to Play · Multiplayer · Online Co-Op
Geometry Dash
Shared: Difficult · Precision Platformer · Level Editor
Celeste
Shared: Difficult · Precision Platformer · Platformer
Brawlhalla
Shared: Free to Play · Multiplayer · 2D Platformer
Super Meat Boy
Shared: Difficult · Precision Platformer · Platformer
BattleBlock Theater®
Shared: Platformer · Online Co-Op · Multiplayer
Cuphead
Shared: Difficult · Platformer · Multiplayer
Spelunky 2
Shared: Difficult · Online Co-Op · 2D Platformer
Team Fortress 2
Shared: Free to Play · Multiplayer · Online Co-Op
PICO PARK
Shared: Online Co-Op · Multiplayer · Puzzle Platformer
Bloody Trapland
Shared: Online Co-Op · Precision Platformer · Difficult
Counter-Strike 2
Shared: Multiplayer · Online Co-Op · Team-Based
Delta Force
Shared: Free to Play · Multiplayer · Online Co-Op
Transformice
Shared: Free to Play · Multiplayer · Platformer
Paladins®
Shared: Free to Play · Multiplayer · Online Co-Op
Marvel Rivals
Shared: Free to Play · Multiplayer · Online Co-Op
Bread & Fred
Shared: Difficult · 2D Platformer · Precision Platformer
VVVVVV
Shared: Precision Platformer · Difficult · Platformer
Don't Starve Together
Shared: Multiplayer · Online Co-Op · Difficult
Hollow Knight
Shared: Difficult · Platformer · 2D
ibb & obb
Shared: Online Co-Op · Platformer · Multiplayer
Bloons TD 6
Shared: Online Co-Op · Multiplayer · Difficult
Hollow Knight: Silksong
Shared: Difficult · Platformer · 2D
The First Descendant
Shared: Free to Play · Online Co-Op · Multiplayer