Games like Extinction Void
Games like Extinction Void include Escape From Duckov, Yet Another Zombie Survivors, The Last Stand: Aftermath, The Binding of Isaac, and Crab Champions. We matched them by the tags players give Extinction Void on Steam (Adventure, Action, Action Roguelike, Top-Down Shooter, and Casual): closest matches first, and among equally close ones the better-known games.

Escape From Duckov
Shared: Adventure · Action · Top-Down Shooter

Yet Another Zombie Survivors
Shared: Action Roguelike · Top-Down Shooter · Zombies

The Last Stand: Aftermath
Shared: Zombies · Top-Down Shooter · Action Roguelike

The Binding of Isaac
Shared: Action Roguelike · Action · Roguelike

Crab Champions
Shared: Action Roguelike · Looter Shooter · Roguelike

Relic Hunters Zero: Remix
Shared: Action · Adventure · Top-Down Shooter

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

Megabonk
Shared: Action Roguelike · Action · Roguelike

Section 13
Shared: Action Roguelike · Top-Down Shooter · Dark

Juicy Realm
Shared: Action · Adventure · Action Roguelike

FatalZone
Shared: Action Roguelike · Top-Down Shooter · Zombies

Hades II
Shared: Action · Action Roguelike · Roguelike

Hero Siege
Shared: Action Roguelike · Action RPG · Action

20 Minutes Till Dawn
Shared: Action Roguelike · Top-Down Shooter · Adventure

R.I.P. - Reincarnation Insurance Program
Shared: Action Roguelike · Zombies · Top-Down Shooter

Dead Cells
Shared: Adventure · Action Roguelike · Roguelike

Noobs Want to Live
Shared: Action · Action Roguelike · Casual

Gunfire Reborn
Shared: Action · Roguelike · Action Roguelike

Blazing Beaks
Shared: Action Roguelike · Action · Top-Down Shooter

Wedding Witch
Shared: Action Roguelike · Action · Casual

Arms of God
Shared: Action Roguelike · Top-Down Shooter · Action

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Action · Action Roguelike

Nuclear Throne
Shared: Action Roguelike · Action · Roguelike

Left 4 Dead 2
Shared: Zombies · Action · Shooter