Games like Breach the Abyss
Games like Breach the Abyss include Vampire Survivors, SYNTHETIK: Legion Rising, SYNTHETIK 2, Nuclear Throne, and BALL x PIT. We matched them by the tags players give Breach the Abyss on Steam (Action Roguelike, Top-Down Shooter, Twin Stick Shooter, Roguelite, and Shooter): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Roguelite · 2D

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Roguelite · Action Roguelike

SYNTHETIK 2
Shared: Top-Down Shooter · Action Roguelike · Roguelite

Nuclear Throne
Shared: Action Roguelike · Top-Down Shooter · Roguelite

BALL x PIT
Shared: Roguelite · Action Roguelike · Top-Down Shooter

Enter the Gungeon
Shared: Action Roguelike · Twin Stick Shooter · Pixel Graphics

Skul: The Hero Slayer
Shared: Action Roguelike · Roguelite · 2D

Blazing Beaks
Shared: Action Roguelike · Top-Down Shooter · Roguelite

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Roguelite · Top-Down Shooter

Hades
Shared: Action Roguelike · Roguelite · Indie

暖雪 Warm Snow
Shared: Action Roguelike · Roguelite · 2D

Brigador: Up-Armored Edition
Shared: Twin Stick Shooter · Top-Down Shooter · Action Roguelike

Relic Hunters Zero: Remix
Shared: Twin Stick Shooter · Top-Down Shooter · Action Roguelike

Time Wasters
Shared: Action Roguelike · Twin Stick Shooter · Roguelite

SNKRX
Shared: Action Roguelike · Top-Down Shooter · Roguelite

Halls of Torment
Shared: Action Roguelike · Roguelite · Pixel Graphics

UnderMine
Shared: Action Roguelike · Roguelite · Top-Down

ANVIL
Shared: Action Roguelike · Top-Down Shooter · Twin Stick Shooter

Voidigo
Shared: Action Roguelike · Twin Stick Shooter · Top-Down Shooter

Rocket Rats
Shared: Action Roguelike · Roguelite · 2D

The Binding of Isaac: Rebirth
Shared: Action Roguelike · 2D · Indie

Yet Another Zombie Survivors
Shared: Action Roguelike · Top-Down Shooter · Roguelite

Death Must Die
Shared: Action Roguelike · Roguelite · 2D

20 Minutes Till Dawn
Shared: Action Roguelike · Roguelite · Top-Down Shooter