Games like Hangtime!
Games like Hangtime! include The Binding of Isaac: Rebirth, Enter the Gungeon, Risk of Rain (2013), Spelunky, and Brotato. We matched them by the tags players give Hangtime! on Steam (Volleyball, Action Roguelike, Local Co-Op, Sports, and Roguelike): closest matches first, and among equally close ones the better-known games.

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

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

Risk of Rain (2013)
Shared: Action Roguelike · Roguelike · Action

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

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

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

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

Vampire Survivors
Shared: Action Roguelike · Roguelike · 2D

Rocket League®
Shared: Sports · Competitive · Multiplayer

Tape to Tape
Shared: Action Roguelike · Local Co-Op · Roguelike

Risk of Rain 2
Shared: Action Roguelike · Roguelike · Multiplayer

SpeedRunners
Shared: Local Multiplayer · Competitive · Multiplayer

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

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

Noita
Shared: Roguelike · Action Roguelike · Perma Death

Nuclear Throne
Shared: Action Roguelike · Roguelike · Local Co-Op

Skul: The Hero Slayer
Shared: Action Roguelike · Roguelike · Action

EA SPORTS FC™ 25
Shared: Sports · Local Co-Op · Competitive

Children of Morta
Shared: Roguelike · Action Roguelike · Local Co-Op

Hades
Shared: Action Roguelike · Roguelike · Action

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

The Binding of Isaac
Shared: Action Roguelike · Roguelike · Indie

Streets of Rogue
Shared: Action Roguelike · Roguelike · Local Co-Op

Broforce
Shared: Local Co-Op · Action · 2D