Games like Abyss Survivors
Games like Abyss Survivors include Skul: The Hero Slayer, Hades, Hades II, Rogue Legacy, and Megabonk. We matched them by the tags players give Abyss Survivors on Steam (Action, Roguelike, Side Scroller, Shoot 'Em Up, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Skul: The Hero Slayer
Shared: Action · Roguelike · Pixel Graphics

Hades
Shared: Action · Roguelike · Hack and Slash

Hades II
Shared: Action · Roguelike · Hack and Slash

Rogue Legacy
Shared: Roguelike · Action · Indie

Megabonk
Shared: Roguelike · Action · Indie

The Binding of Isaac: Rebirth
Shared: Roguelike · Pixel Graphics · Indie

Dungreed
Shared: Roguelike · Action · Pixel Graphics

Dead Cells
Shared: Roguelike · Pixel Graphics · Hack and Slash

ICEY
Shared: Action · Side Scroller · Hack and Slash

Vampire Survivors
Shared: Pixel Graphics · Roguelike · Indie

Children of Morta
Shared: Roguelike · Pixel Graphics · Hack and Slash

BALL x PIT
Shared: Action · Roguelike · Shoot 'Em Up

Katana ZERO
Shared: Action · Pixel Graphics · Indie

Hero Siege
Shared: Pixel Graphics · Hack and Slash · Roguelike

Risk of Rain (2013)
Shared: Roguelike · Action · Pixel Graphics

SANABI
Shared: Action · Pixel Graphics · Singleplayer

Dome Keeper
Shared: Roguelike · Action · Singleplayer

Blade Assault
Shared: Action · Roguelike · Pixel Graphics

Wizard of Legend
Shared: Roguelike · Pixel Graphics · Action

Nuclear Throne
Shared: Roguelike · Pixel Graphics · Action

Broforce
Shared: Action · Pixel Graphics · Side Scroller

Halls of Torment
Shared: Roguelike · Pixel Graphics · Action

Enter the Gungeon
Shared: Roguelike · Pixel Graphics · Indie

Noita
Shared: Roguelike · Pixel Graphics · Indie