Games like Excids: Endless Siege
Games like Excids: Endless Siege include Vampire Survivors, Halls of Torment, Megabonk, Skul: The Hero Slayer, and Death Must Die. We matched them by the tags players give Excids: Endless Siege on Steam (Action, Strategy, Roguelike, Action Roguelike, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Halls of Torment
Shared: Action Roguelike · Bullet Hell · Roguelite

Megabonk
Shared: Roguelike · Action Roguelike · Roguelite

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

Death Must Die
Shared: Action Roguelike · Bullet Hell · Roguelite

BALL x PIT
Shared: Action · Roguelike · Roguelite

Enter the Gungeon
Shared: Roguelike · Action Roguelike · Bullet Hell

Dead Cells
Shared: Roguelike · Action Roguelike · Roguelite

Nuclear Throne
Shared: Roguelike · Action Roguelike · Action

The Binding of Isaac: Rebirth
Shared: Roguelike · Action Roguelike · Pixel Graphics

Hades
Shared: Action Roguelike · Action · Roguelite

Dungreed
Shared: Action Roguelike · Roguelike · Action

Atomicrops
Shared: Action · Roguelike · Bullet Hell

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Roguelike · Bullet Hell

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Roguelite

Brotato
Shared: Roguelike · Action Roguelike · Bullet Hell

Rogue Legacy
Shared: Roguelike · Action · Action Roguelike

Sephiria
Shared: Action Roguelike · Roguelike · Roguelite

Hades II
Shared: Action · Roguelike · Roguelite

Risk of Rain (2013)
Shared: Roguelike · Action Roguelike · Action

Everything is Crab: The Animal Evolution Roguelite
Shared: Action Roguelike · Strategy · Roguelite

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelike

Risk of Rain 2
Shared: Action Roguelike · Roguelike · Action