Games like Ultimate Tag
Games like Ultimate Tag include Brawlhalla, Broforce, Duck Game, Stick Fight: The Game, and Katana ZERO. We matched them by the tags players give Ultimate Tag on Steam (Action, 4 Player Local, 2D Platformer, Platformer, and Family Friendly): closest matches first, and among equally close ones the better-known games.

Brawlhalla
Shared: 2D Platformer · Casual · Platformer

Broforce
Shared: Action · Platformer · Pixel Graphics

Duck Game
Shared: Action · 4 Player Local · Platformer

Stick Fight: The Game
Shared: Action · 4 Player Local · PvP

Katana ZERO
Shared: Action · Platformer · Pixel Graphics

Move or Die
Shared: Action · 4 Player Local · 2D

Sonic Superstars
Shared: Action · 2D Platformer · Platformer

SpeedRunners
Shared: Action · Platformer · 4 Player Local

Rivals of Aether
Shared: Pixel Graphics · Platformer · 4 Player Local

SANABI
Shared: Action · 2D Platformer · Pixel Graphics

Sonic Origins
Shared: Action · 2D Platformer · Platformer

Spelunky 2
Shared: 2D Platformer · Platformer · 4 Player Local

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

Twin Shot Deluxe
Shared: Action · 2D Platformer · Casual

Overcooked! 2
Shared: 4 Player Local · Casual · Action

Webbed
Shared: 2D Platformer · Pixel Graphics · Platformer

Pizza Tower
Shared: 2D Platformer · Platformer · Action

Shovel Knight: Treasure Trove
Shared: Platformer · Action · Pixel Graphics

Sonic Mania
Shared: Platformer · 2D · Action

Gravity Circuit
Shared: Action · Platformer · 2D Platformer

Timberman
Shared: Action · Casual · Pixel Graphics

Ultimate Chicken Horse
Shared: Platformer · PvP · 4 Player Local

TowerFall Ascension
Shared: Action · 4 Player Local · Platformer

Celeste
Shared: Platformer · 2D Platformer · Pixel Graphics