Games like TowerFall Dark World Expansion
Games like TowerFall Dark World Expansion include Broforce, Stick Fight: The Game, Brawlhalla, Rivals of Aether, and TowerFall Ascension. We matched them by the tags players give TowerFall Dark World Expansion on Steam (Indie, Action, 4 Player Local, Local Co-Op, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · Local Co-Op · Indie

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

Brawlhalla
Shared: Multiplayer · Local Multiplayer · Action

Rivals of Aether
Shared: Indie · Multiplayer · Local Multiplayer

TowerFall Ascension
Shared: Indie · Action · Local Multiplayer

Duck Game
Shared: Multiplayer · Action · Local Multiplayer

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

Gang Beasts
Shared: Action · Multiplayer · Co-op

SpeedRunners
Shared: Indie · Multiplayer · Local Multiplayer

Move or Die
Shared: Action · Multiplayer · Local Multiplayer

Rayman® Legends
Shared: Action · Local Co-Op · Adventure

Castle Crashers®
Shared: Co-op · 4 Player Local · 2D

Rivals of Aether II
Shared: Indie · Multiplayer · Action

Awesomenauts
Shared: Action · Multiplayer · Indie

Bopl Battle
Shared: 4 Player Local · Action · Multiplayer

Cuphead
Shared: Local Co-Op · Co-op · Indie

Streets of Rage 4
Shared: Action · Indie · Local Multiplayer

Human Fall Flat
Shared: Co-op · Multiplayer · Action

BADLAND: Game of the Year Edition
Shared: Indie · Action · Local Co-Op

It Takes Two
Shared: Multiplayer · Local Co-Op · Co-op

Overcooked
Shared: Indie · Local Co-Op · Multiplayer

Heave Ho
Shared: Indie · Multiplayer · Local Co-Op

Lovers in a Dangerous Spacetime
Shared: 4 Player Local · Local Co-Op · Multiplayer

Terraria
Shared: Multiplayer · Adventure · 2D