Games like Alien Cat 3
Games like Alien Cat 3 include Terraria, Dead Cells, Forager, Vampire Survivors, and Exit the Gungeon. We matched them by the tags players give Alien Cat 3 on Steam (Arena Shooter, Arcade, 2D, Adventure, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: 2D · Pixel Graphics · Adventure

Dead Cells
Shared: Adventure · 2D · Pixel Graphics

Forager
Shared: Pixel Graphics · 2D · Survival

Vampire Survivors
Shared: Pixel Graphics · 2D · Arcade

Exit the Gungeon
Shared: Arcade · Adventure · 2D

The Final Station
Shared: Pixel Graphics · 2D · Adventure

Hyper Light Drifter
Shared: Pixel Graphics · Adventure · Indie

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · 2D · Adventure

Skul: The Hero Slayer
Shared: Pixel Graphics · 2D · Indie

Rain World
Shared: Pixel Graphics · 2D · Survival

The Escapists
Shared: Pixel Graphics · 2D · Adventure

Banana
Shared: 2D · Arcade · Singleplayer

UFO 50
Shared: Pixel Graphics · 2D · Arcade

SANABI
Shared: Pixel Graphics · Adventure · 2D

Gato Roboto
Shared: Adventure · Pixel Graphics · 2D

Castle Crashers®
Shared: 2D · Adventure · Hack and Slash

To the Moon
Shared: Pixel Graphics · Adventure · Indie

Reventure
Shared: Adventure · Pixel Graphics · 2D

Brotato
Shared: Arena Shooter · Singleplayer · Survival

SUPER CHICKEN JUMPER
Shared: Arcade · 2D · Pixel Graphics

Celeste
Shared: Pixel Graphics · 2D · Indie

Cat Quest
Shared: Adventure · Cats · Hack and Slash

Five Nights at Freddy's: Into the Pit
Shared: 2D · Adventure · Pixel Graphics

Starbound
Shared: Adventure · Survival · Pixel Graphics