Games like Signal Scavenger
Games like Signal Scavenger include Hades, The Binding of Isaac: Rebirth, Megabonk, Skul: The Hero Slayer, and Dome Keeper. We matched them by the tags players give Signal Scavenger on Steam (Indie, Singleplayer, Third Person, Early Access, and Post-apocalyptic): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Indie · Action Roguelike · Singleplayer

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

Megabonk
Shared: Indie · Action Roguelike · Roguelike

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

Dome Keeper
Shared: Singleplayer · Post-apocalyptic · Roguelike

Vampire Survivors
Shared: Action Roguelike · Indie · Singleplayer

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

Warhammer 40,000: Space Marine 2
Shared: Third Person · PvE · Singleplayer

The Last of Us™ Part I
Shared: Post-apocalyptic · Singleplayer · Horror

Brotato
Shared: Singleplayer · Roguelike · Action Roguelike

Resident Evil 4
Shared: Singleplayer · Horror · Action

STAR WARS Jedi: Survivor™
Shared: Singleplayer · Third Person · Action

Rogue Legacy
Shared: Indie · Singleplayer · Action Roguelike

Resident Evil 2
Shared: Singleplayer · Third Person · Horror

Days Gone
Shared: Singleplayer · Post-apocalyptic · Third Person

SKYHILL
Shared: Indie · Action Roguelike · Post-apocalyptic

Metro Exodus
Shared: Singleplayer · Post-apocalyptic · Horror

Fallout 4
Shared: Singleplayer · Post-apocalyptic · Adventure

Dead Space (2008)
Shared: Third Person · Singleplayer · Horror

Bendy and the Dark Revival
Shared: Singleplayer · Indie · Horror

DreadOut
Shared: Indie · Third Person · Singleplayer

ELDEN RING NIGHTREIGN
Shared: Singleplayer · Roguelike · Third Person

Nuclear Throne
Shared: Indie · Action Roguelike · Roguelike

God of War
Shared: Singleplayer · Third Person · Action