Games like Summer Party Time
Games like Summer Party Time include Overcooked! 2, Gang Beasts, Overcooked, Stick Fight: The Game, and Castle Crashers®. We matched them by the tags players give Summer Party Time on Steam (Local Multiplayer, Local Co-Op, 4 Player Local, Action, and Singleplayer): closest matches first, and among equally close ones the better-known games.

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

Gang Beasts
Shared: Local Multiplayer · Multiplayer · Action

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

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

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

Party Animals
Shared: Multiplayer · Casual · Action

Brawlhalla
Shared: Multiplayer · Local Multiplayer · Casual

Pummel Party
Shared: 4 Player Local · Multiplayer · Local Multiplayer

Move or Die
Shared: Local Multiplayer · Multiplayer · Action

LEGO® Star Wars™ - The Complete Saga
Shared: Local Co-Op · Co-op · Multiplayer

Bopl Battle
Shared: 4 Player Local · Multiplayer · Action

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

Broforce
Shared: Action · Local Co-Op · Co-op

Unrailed!
Shared: Local Co-Op · Multiplayer · Local Multiplayer

Human Fall Flat
Shared: Co-op · Multiplayer · Local Co-Op

PICO PARK
Shared: Local Co-Op · Multiplayer · Local Multiplayer

Moving Out
Shared: Action · Local Co-Op · Local Multiplayer

Sonic Racing: CrossWorlds
Shared: Local Multiplayer · Multiplayer · Singleplayer

Duck Game
Shared: Local Multiplayer · Multiplayer · Action

SpeedRunners
Shared: Local Multiplayer · Multiplayer · Action

BattleBlock Theater®
Shared: Local Co-Op · Co-op · Multiplayer

Ultimate Chicken Horse
Shared: Local Co-Op · Multiplayer · Local Multiplayer

Magicka
Shared: Action · Co-op · Multiplayer

Unravel Two
Shared: Local Co-Op · Multiplayer · Co-op