Games like Ascendant
Games like Ascendant include Vampire Survivors, Halls of Torment, BALL x PIT, Deep Rock Galactic: Survivor, and Enter the Gungeon. We matched them by the tags players give Ascendant on Steam (Arcade, Dungeon Crawler, Magic, Gun Customization, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Roguelite · Pixel Graphics

Halls of Torment
Shared: Bullet Hell · Roguelite · Arcade

BALL x PIT
Shared: Arcade · Roguelite · Bullet Hell

Deep Rock Galactic: Survivor
Shared: Bullet Hell · Roguelite · Arcade

Enter the Gungeon
Shared: Bullet Hell · Dungeon Crawler · Pixel Graphics

UnderMine
Shared: Dungeon Crawler · Roguelite · Pixel Graphics

Megabonk
Shared: Roguelite · Bullet Hell · Arcade

Tiny Rogues
Shared: Bullet Hell · Dungeon Crawler · Roguelite

Noita
Shared: Dungeon Crawler · Pixel Graphics · Perma Death

The Spell Brigade
Shared: Bullet Hell · Roguelite · Magic

Wizard of Legend
Shared: Dungeon Crawler · Magic · Pixel Graphics

Darkest Dungeon® II
Shared: Dungeon Crawler · Roguelite · Perma Death

Death Must Die
Shared: Bullet Hell · Roguelite · Pixel Graphics

20 Minutes Till Dawn
Shared: Bullet Hell · Roguelite · Pixel Graphics

Seraph's Last Stand
Shared: Bullet Hell · Magic · Pixel Graphics

Star of Providence
Shared: Bullet Hell · Roguelite · Dungeon Crawler

Nuclear Throne
Shared: Bullet Hell · Pixel Graphics · Roguelite

Shape of Dreams
Shared: Roguelite · Dungeon Crawler · Top-Down

Darkest Dungeon®
Shared: Dungeon Crawler · Dark Fantasy · Perma Death

Exit the Gungeon
Shared: Arcade · Bullet Hell · Pixel Graphics

Hades
Shared: Roguelite · Dungeon Crawler · Indie

Rogue: Genesia
Shared: Arcade · Bullet Hell · Roguelite

Boneraiser Minions
Shared: Bullet Hell · Roguelite · Pixel Graphics

Moonlighter
Shared: Dungeon Crawler · Roguelite · Pixel Graphics