Games like Star Boy
Games like Star Boy include Streets of Rage 4, Castle Crashers®, Charlie Murder, METAL SLUG 3, and Kung Fury: Street Rage - Ultimate Edition. We matched them by the tags players give Star Boy on Steam (Action, Adventure, Indie, 4 Player Local, and Retro): closest matches first, and among equally close ones the better-known games.

Streets of Rage 4
Shared: Action · Indie · Beat 'em up

Castle Crashers®
Shared: Adventure · Beat 'em up · Co-op

Charlie Murder
Shared: Action · Indie · Adventure

METAL SLUG 3
Shared: Action · Retro · Classic

Kung Fury: Street Rage - Ultimate Edition
Shared: Action · Indie · Beat 'em up

Dungeons & Dragons: Chronicles of Mystara
Shared: Action · Beat 'em up · Adventure

Full Metal Furies
Shared: Action · Indie · Adventure

Bud Spencer & Terence Hill - Slaps And Beans
Shared: Action · Beat 'em up · Retro

METAL SLUG X
Shared: Action · Co-op · Retro

METAL SLUG
Shared: Action · Retro · Shoot 'Em Up

Broforce
Shared: Action · Indie · Co-op

Double Dragon: Neon
Shared: Action · Beat 'em up · Co-op

UFO 50
Shared: Indie · Action · Retro

Scott Pilgrim vs. The World™: The Game – Complete Edition
Shared: Action · Adventure · Beat 'em up

Lost Castle
Shared: 4 Player Local · Beat 'em up · Side Scroller

Guns, Gore and Cannoli 2
Shared: Action · Co-op · Adventure

Shovel Knight: Treasure Trove
Shared: Indie · Retro · Adventure

PARTICLE MACE
Shared: Action · Indie · Adventure

Cyberhunt
Shared: Action · Indie · Adventure

PEAK
Shared: Adventure · Co-op · Online Co-Op

Magicka
Shared: Action · Co-op · Adventure

The TakeOver
Shared: Action · Indie · Beat 'em up

Shank 2
Shared: Action · Indie · Adventure

How to Fish
Shared: Indie · Co-op · Adventure