Games like Alpha Runner 2
Games like Alpha Runner 2 include Broforce, Pikuniku, Montaro, pureya, and Shelldiver. We matched them by the tags players give Alpha Runner 2 on Steam (Casual, Runner, Simulation, Arcade, and Platformer): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Platformer · 2D · Shooter

Pikuniku
Shared: Casual · Puzzle · Platformer

Montaro
Shared: Casual · Runner · Platformer

pureya
Shared: Casual · Arcade · Platformer

Shelldiver
Shared: Casual · Arcade · Simulation

LIMBO
Shared: Platformer · Puzzle · 2D

Progressbar95
Shared: Casual · Arcade · Puzzle

Nitro Express
Shared: Runner · Shooter · 2D Platformer

Unpacking
Shared: Casual · Puzzle · Simulation

Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
Shared: Arcade · Casual · Simulation

FEZ
Shared: Platformer · Puzzle · Casual

There Is No Game: Wrong Dimension
Shared: Puzzle · Casual · Indie

Sonic Origins
Shared: Casual · 2D Platformer · Platformer

Planet of Lana
Shared: Puzzle · Platformer · 2D Platformer

BEEP
Shared: Platformer · Casual · Puzzle

Twin Shot Deluxe
Shared: Casual · Arcade · Platformer

Nodebuster
Shared: Casual · Simulation · Arcade

Webbed
Shared: 2D Platformer · Platformer · Cute

Toki Tori
Shared: Casual · Puzzle · Platformer

Thank Goodness You're Here!
Shared: Casual · 2D Platformer · Platformer

Turbo Pug
Shared: Casual · Runner · Platformer

Rogue Legacy 2
Shared: Arcade · Platformer · Action

Marble Mayhem: Fragile Ball
Shared: Casual · Puzzle · Arcade

Celeste
Shared: Platformer · 2D Platformer · Indie