Games like The Last Tater
Games like The Last Tater include Broforce, Pizza Tower, Touhou Hero of Ice Fairy, Momodora: Reverie Under The Moonlight, and Webbed. We matched them by the tags players give The Last Tater on Steam (Side Scroller, 2D Platformer, Bullet Hell, Platformer, and Shooter): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Platformer · 2D · Side Scroller

Pizza Tower
Shared: 2D Platformer · Platformer · Funny

Touhou Hero of Ice Fairy
Shared: Bullet Hell · Side Scroller · Platformer

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Side Scroller · 2D

Webbed
Shared: 2D Platformer · Cute · Platformer

SANABI
Shared: 2D Platformer · Action · Platformer

Celeste
Shared: 2D Platformer · Platformer · 2D

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

Warhammer 40,000: Shootas, Blood & Teef
Shared: Side Scroller · 2D Platformer · Bullet Hell

My Friend Pedro
Shared: Shooter · Side Scroller · Action

BattleBlock Theater®
Shared: Platformer · Funny · 2D Platformer

Deadlight
Shared: Platformer · Side Scroller · Action

Anomaly Agent
Shared: Side Scroller · 2D Platformer · Platformer

Dungeon Munchies
Shared: Action · Side Scroller · Funny

Smilemo
Shared: Platformer · 2D Platformer · Side Scroller

Grapple Dog
Shared: 2D Platformer · Platformer · 2D

Super Meat Boy
Shared: Platformer · 2D Platformer · 2D

Songs for a Hero - Definitive Edition
Shared: 2D Platformer · Platformer · Funny

Gal Guardians: Demon Purge
Shared: 2D Platformer · Side Scroller · Platformer

Oozi: Earth Adventure
Shared: 2D Platformer · Platformer · Side Scroller

Rabi-Ribi
Shared: Bullet Hell · Side Scroller · Cute

Cuphead
Shared: Platformer · 2D · Bullet Hell

Eryi's Action
Shared: 2D Platformer · Platformer · Bullet Hell

Thomas Was Alone
Shared: Side Scroller · Platformer · 2D Platformer