Games like Neon Ascending
Games like Neon Ascending include Vampire Survivors, Balatro, Astro Prospector, Peglin, and Rogue Tower. We matched them by the tags players give Neon Ascending on Steam (Bullet Hell, Roguelite, Tower Defense, Incremental, and Perma Death): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Roguelite · Roguelike

Balatro
Shared: Roguelike · Roguelite · Strategy

Astro Prospector
Shared: Incremental · Roguelite · Bullet Hell

Peglin
Shared: Roguelite · Roguelike · Perma Death

Rogue Tower
Shared: Tower Defense · Roguelike · Strategy

Megabonk
Shared: Roguelite · Bullet Hell · Roguelike

Necrosmith
Shared: Tower Defense · Roguelite · Bullet Hell

Slay the Spire 2
Shared: Roguelike · Strategy · Deckbuilding

Slay the Spire
Shared: Roguelike · Roguelite · Strategy

Bloons TD 6
Shared: Tower Defense · Strategy · Casual

RACCOIN: Coin Pusher Roguelike
Shared: Roguelike · Strategy · Roguelite

Emberward
Shared: Tower Defense · Roguelite · Strategy

Brotato
Shared: Bullet Hell · Roguelike · Roguelite

Heretic's Fork
Shared: Tower Defense · Roguelite · Strategy

Sir, We Have an Orc Problem
Shared: Tower Defense · Roguelite · Incremental

FTL: Faster Than Light
Shared: Roguelike · Strategy · Perma Death

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · Casual

Void Miner – Incremental Asteroids Roguelite
Shared: Roguelite · Bullet Hell · Incremental

Seraph's Last Stand
Shared: Bullet Hell · Roguelike · Casual

The King is Watching
Shared: Tower Defense · Roguelike · RTS

Yokai Art: Night Parade of One Hundred Demons
Shared: Roguelite · Tower Defense · Strategy

Brutal Orchestra
Shared: Roguelite · Strategy · Roguelike

(the) Gnorp Apologue
Shared: Incremental · Roguelite · Strategy

SHOOPER NOVA
Shared: Bullet Hell · Roguelite · Tower Defense