Games like The Drain
Games like The Drain include Hades, Vampire Survivors, 暖雪 Warm Snow, Skul: The Hero Slayer, and Dead Cells. We matched them by the tags players give The Drain on Steam (Action Roguelike, Roguelite, 2D Fighter, Roguelike, and Character Customization): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Action Roguelike · Roguelite · Roguelike

Vampire Survivors
Shared: Action Roguelike · Roguelite · 2D

暖雪 Warm Snow
Shared: Action Roguelike · Roguelite · Roguelike

Skul: The Hero Slayer
Shared: Action Roguelike · Roguelike · Roguelite

Dead Cells
Shared: Action Roguelike · Roguelike · Roguelite

Hades II
Shared: Roguelite · Roguelike · Action Roguelike

Halls of Torment
Shared: Action Roguelike · Roguelite · Roguelike

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Roguelike · 2D

Death Must Die
Shared: Action Roguelike · Roguelite · Roguelike

Megabonk
Shared: Action Roguelike · Roguelite · Roguelike

BALL x PIT
Shared: Roguelite · Action Roguelike · Roguelike

The Binding of Isaac
Shared: Action Roguelike · Roguelike · Top-Down

Hero Siege
Shared: Action Roguelike · Hack and Slash · Roguelike

Have a Nice Death
Shared: Action Roguelike · 2D · Hack and Slash

Moonlighter
Shared: Roguelite · Action Roguelike · Roguelike

Dungreed
Shared: Action Roguelike · Roguelite · Roguelike

Soulstone Survivors
Shared: Action Roguelike · Roguelite · Roguelike

Sephiria
Shared: Action Roguelike · Roguelite · Roguelike

Anomaly Agent
Shared: Action Roguelike · 2D Fighter · Roguelite

Nuclear Throne
Shared: Action Roguelike · Roguelike · Roguelite

Cinderia
Shared: Action Roguelike · Roguelite · Roguelike

Spiritfall
Shared: Action Roguelike · 2D Fighter · Roguelite

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Roguelite · Roguelike

Rogue Legacy
Shared: Action Roguelike · Roguelike · 2D