Games like Horde Slayer
Games like Horde Slayer include Halls of Torment, Death Must Die, Hero Siege, Vampire Survivors, and Soulstone Survivors. We matched them by the tags players give Horde Slayer on Steam (Bullet Hell, Hack and Slash, Top-Down Shooter, Roguelite, and PvE): closest matches first, and among equally close ones the better-known games.
Halls of Torment
Shared: Bullet Hell · Roguelite · Action RPG
Death Must Die
Shared: Bullet Hell · Roguelite · Hack and Slash
Hero Siege
Shared: Hack and Slash · Action RPG · RPG
Vampire Survivors
Shared: Bullet Hell · Roguelite · Roguelike
Soulstone Survivors
Shared: Bullet Hell · Roguelite · Action RPG
Hades II
Shared: Hack and Slash · Roguelite · Roguelike
Hades
Shared: Hack and Slash · Roguelite · Roguelike
BALL x PIT
Shared: Bullet Hell · Roguelite · Top-Down Shooter
Wolcen: Lords of Mayhem
Shared: Hack and Slash · Action RPG · RPG
Moonlighter
Shared: Hack and Slash · Roguelite · Roguelike
Brotato
Shared: Bullet Hell · Roguelike · Roguelite
Last Epoch
Shared: Hack and Slash · Action RPG · RPG
Slime 3K: Rise Against Despot
Shared: Bullet Hell · Roguelite · Top-Down Shooter
Tower of Babel: Survivors of Chaos
Shared: Bullet Hell · Roguelite · Hack and Slash
Nuclear Throne
Shared: Bullet Hell · Roguelike · Roguelite
Heroes of Hammerwatch II
Shared: Action RPG · RPG · Roguelite
Nordic Ashes: Survivors of Ragnarok
Shared: Bullet Hell · Roguelite · Action RPG
Army of Ruin
Shared: Bullet Hell · Top-Down Shooter · Hack and Slash
Dead Cells
Shared: Roguelike · Roguelite · Hack and Slash
Deep Rock Galactic: Survivor
Shared: Bullet Hell · Roguelite · Top-Down Shooter
Grim Dawn
Shared: Hack and Slash · Action RPG · RPG
Rotwood
Shared: Hack and Slash · Roguelite · PvE
Path of Exile 2
Shared: Hack and Slash · Action RPG · RPG
NIMRODS
Shared: Bullet Hell · Top-Down Shooter · Roguelite