Games like Round 99 - THE CLASSIC PACK
Games like Round 99 - THE CLASSIC PACK include Cuphead, Broforce, Rogue Legacy 2, Spelunky, and Pizza Tower. We matched them by the tags players give Round 99 - THE CLASSIC PACK on Steam (Action, Indie, Platformer, Arcade, and Local Co-Op): closest matches first, and among equally close ones the better-known games.

Cuphead
Shared: Platformer · Local Co-Op · Indie

Broforce
Shared: Action · Platformer · Local Co-Op

Rogue Legacy 2
Shared: Action · Arcade · Platformer

Spelunky
Shared: Platformer · Indie · 2D

Pizza Tower
Shared: Indie · Platformer · Cartoony

Streets of Rage 4
Shared: Action · Indie · Arcade

Geometry Dash
Shared: 2D · Platformer · Indie

Guacamelee! Super Turbo Championship Edition
Shared: Platformer · Action · 2D

Shovel Knight: Treasure Trove
Shared: Platformer · Indie · Action

Hollow Knight
Shared: Platformer · Indie · 2D

Blazing Chrome
Shared: Action · Indie · Arcade

Rayman® Origins
Shared: Platformer · Local Co-Op · 2D

Guacamelee! 2
Shared: Platformer · Action · Local Co-Op

Vampire Survivors
Shared: Indie · 2D · Action

Skul: The Hero Slayer
Shared: Action · Indie · 2D

Sonic Mania
Shared: Platformer · 2D · Action

The Bug Butcher
Shared: Action · Indie · Arcade

UFO 50
Shared: Indie · Action · Arcade

Downwell
Shared: Indie · Platformer · Action

LUFTRAUSERS
Shared: Indie · Action · Arcade

Katana ZERO
Shared: Action · Platformer · Indie

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

Super Meat Boy
Shared: Platformer · Indie · 2D

METAL SLUG 3
Shared: Action · Arcade · Local Co-Op