Games like Animosity
Games like Animosity include Broforce, Human Fall Flat, Pikuniku, LIMBO, and Chained Together. We matched them by the tags players give Animosity on Steam (Side Scroller, Puzzle Platformer, Platformer, Shooter, and 2.5D): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Platformer · Side Scroller · Shooter

Human Fall Flat
Shared: Puzzle Platformer · Funny · PvP

Pikuniku
Shared: Cute · Platformer · Funny

LIMBO
Shared: Puzzle Platformer · Platformer · Side Scroller

Chained Together
Shared: Platformer · Puzzle Platformer · Funny

My Friend Pedro
Shared: Shooter · Side Scroller · Platformer

Pogostuck: Rage With Your Friends
Shared: Platformer · Side Scroller · Funny

The Pedestrian
Shared: Puzzle Platformer · Side Scroller · Platformer

PUBG: BATTLEGROUNDS
Shared: Shooter · PvP · Action

Apex Legends™
Shared: Shooter · PvP · Team-Based

Oddworld: New 'n' Tasty
Shared: Puzzle Platformer · Platformer · Side Scroller

Portal 2
Shared: Platformer · Puzzle Platformer · Funny

BattleBlock Theater®
Shared: Platformer · Funny · PvP

Bloodstained: Ritual of the Night
Shared: Side Scroller · Platformer · 2.5D

Max: The Curse of Brotherhood
Shared: Puzzle Platformer · Platformer · Side Scroller

INSIDE
Shared: Puzzle Platformer · 2.5D · Platformer

Party Animals
Shared: Funny · Cute · PvP

Shovel Knight: Treasure Trove
Shared: Platformer · Side Scroller · PvP

Shantae: Half-Genie Hero
Shared: Platformer · Side Scroller · Cute

Mighty No. 9
Shared: Side Scroller · Platformer · 2.5D

PICO PARK
Shared: Puzzle Platformer · Platformer · Cute

Klonoa Phantasy Reverie Series
Shared: Side Scroller · 2.5D · Cute

Planet of Lana
Shared: Puzzle Platformer · Platformer · Action

MO:Astray
Shared: Puzzle Platformer · Platformer · Indie