Games like Plummet
Games like Plummet include Stick Fight: The Game, Rivals of Aether, Duck Game, Bopl Battle, and Brawlhalla. We matched them by the tags players give Plummet on Steam (Action, Local Multiplayer, 4 Player Local, Top-Down, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

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

Rivals of Aether
Shared: Pixel Graphics · Local Multiplayer · 2D Fighter

Duck Game
Shared: Local Multiplayer · Action · Pixel Graphics

Bopl Battle
Shared: Action · 4 Player Local · 2D Fighter

Brawlhalla
Shared: Local Multiplayer · 2D Fighter · Action

TowerFall Ascension
Shared: Local Multiplayer · Action · 2D Fighter

DRAGON BALL FighterZ
Shared: Action · Local Multiplayer · 2D Fighter

Broforce
Shared: Action · Pixel Graphics · 2D

Street Fighter™ 6
Shared: Action · 2D Fighter · PvP

Move or Die
Shared: Local Multiplayer · Action · 4 Player Local

ROUNDS
Shared: Local Multiplayer · Action · 2D Fighter

TEKKEN 7
Shared: Action · Local Multiplayer · Multiplayer

Castle Crashers®
Shared: 2D · 4 Player Local · Local Multiplayer

GUILTY GEAR -STRIVE-
Shared: 2D Fighter · PvP · Action

Crawl
Shared: Local Multiplayer · Pixel Graphics · 4 Player Local

SpeedRunners
Shared: Local Multiplayer · Action · Multiplayer

Your Only Move Is HUSTLE
Shared: Action · 2D Fighter · Pixel Graphics

Rivals of Aether II
Shared: Local Multiplayer · Action · 4 Player Local

Ultra Street Fighter® IV
Shared: Local Multiplayer · Action · 2D Fighter

THE KING OF FIGHTERS 2002 UNLIMITED MATCH
Shared: Action · 2D Fighter · Local Multiplayer

Mortal Kombat 11
Shared: Action · Local Multiplayer · 2D Fighter

Nidhogg
Shared: Local Multiplayer · Pixel Graphics · Action

A Few Quick Matches
Shared: Action · 4 Player Local · 2D Fighter

UNDER NIGHT IN-BIRTH II Sys:Celes
Shared: Action · 2D Fighter · Pixel Graphics