Games like UnderKingdom
Games like UnderKingdom include Vampire Survivors, BALL x PIT, Magicraft, Megabonk, and Halls of Torment. We matched them by the tags players give UnderKingdom on Steam (Bullet Hell, Shoot 'Em Up, Roguelite, Roguelike, and RPG): closest matches first, and among equally close ones the better-known games.
Vampire Survivors
Shared: Bullet Hell · Roguelite · Roguelike
BALL x PIT
Shared: Roguelite · Bullet Hell · Roguelike
Magicraft
Shared: Bullet Hell · Roguelite · Roguelike
Megabonk
Shared: Roguelite · Roguelike · Bullet Hell
Halls of Torment
Shared: Bullet Hell · Roguelite · Roguelike
20 Minutes Till Dawn
Shared: Bullet Hell · Roguelite · Shoot 'Em Up
Death Must Die
Shared: Bullet Hell · Roguelite · RPG
Sephiria
Shared: Roguelite · Roguelike · RPG
Soulstone Survivors
Shared: Bullet Hell · Roguelite · Roguelike
Brotato
Shared: Bullet Hell · Roguelike · Roguelite
Greedland
Shared: Shoot 'Em Up · Roguelite · Bullet Hell
Noobs Want to Live
Shared: Bullet Hell · Roguelike · Roguelite
Nordic Ashes: Survivors of Ragnarok
Shared: Bullet Hell · Roguelite · Roguelike
Cultivation Story: Reincarnation
Shared: Bullet Hell · Roguelite · RPG
I Am Legion: Stand Survivors
Shared: Bullet Hell · Roguelite · Shoot 'Em Up
Star of Providence
Shared: Bullet Hell · Roguelite · Shoot 'Em Up
Apocalypse Party
Shared: Bullet Hell · Roguelite · Shoot 'Em Up
Beautiful Mystic Survivors
Shared: Bullet Hell · Shoot 'Em Up · Roguelite
UnderMine
Shared: Roguelite · RPG · Top-Down
Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Roguelite
The Binding of Isaac
Shared: Roguelike · Procedural Generation · Top-Down
Hades
Shared: Roguelite · Roguelike · RPG
Enter the Gungeon
Shared: Bullet Hell · Roguelike · Indie
Hades II
Shared: Roguelite · Roguelike · RPG