Games like Neon Abyss
Games like Neon Abyss include Megabonk, Dead Cells, The Binding of Isaac: Rebirth, Brotato, and Death Must Die. We matched them by the tags players give Neon Abyss on Steam (Roguelike, Platformer, Bullet Heaven, Loot, and Procedural Generation): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Roguelike · Bullet Heaven · Loot

Dead Cells
Shared: Roguelike · Pixel Graphics · Adventure

The Binding of Isaac: Rebirth
Shared: Roguelike · Replay Value · Pixel Graphics

Brotato
Shared: Roguelike · Singleplayer · Bullet Heaven

Death Must Die
Shared: Bullet Heaven · Pixel Graphics · Roguelike

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

Vampire Survivors
Shared: Roguelike · Pixel Graphics · Singleplayer

The Binding of Isaac
Shared: Roguelike · Procedural Generation · Replay Value

Rogue Legacy
Shared: Roguelike · Platformer · Singleplayer

Enter the Gungeon
Shared: Roguelike · Pixel Graphics · Bullet Hell

Dungreed
Shared: Roguelike · Pixel Graphics · Platformer

Neon Abyss 2
Shared: Roguelike · Platformer · Cyberpunk

Tower of Babel: Survivors of Chaos
Shared: Bullet Heaven · Roguelike · Loot

Halls of Torment
Shared: Roguelike · Pixel Graphics · Bullet Heaven

Spelunky
Shared: Roguelike · Platformer · Procedural Generation

Hades
Shared: Roguelike · Singleplayer · Roguelite

Caveblazers
Shared: Platformer · Roguelike · Pixel Graphics

BlazBlue Entropy Effect
Shared: Platformer · Pixel Graphics · Replay Value

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

Soulstone Survivors
Shared: Bullet Heaven · Roguelike · Bullet Hell

ScourgeBringer
Shared: Roguelike · Platformer · Pixel Graphics

Moonlighter
Shared: Roguelike · Pixel Graphics · Procedural Generation

Stoneshard
Shared: Roguelike · Pixel Graphics · Procedural Generation

SANABI
Shared: Pixel Graphics · Singleplayer · Platformer