Games like Star Scavenger
Games like Star Scavenger include Vampire Survivors, BALL x PIT, Risk of Rain Returns, Deep Rock Galactic: Survivor, and Windowkill. We matched them by the tags players give Star Scavenger on Steam (Action Roguelike, Top-Down Shooter, Arcade, 2D, and Space): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · 2D · Arcade

BALL x PIT
Shared: Arcade · Action Roguelike · Action

Risk of Rain Returns
Shared: Action Roguelike · 2D · Arcade

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Top-Down Shooter · Arcade

Windowkill
Shared: Action Roguelike · Arcade · Action

Spelunky
Shared: Action Roguelike · 2D · Arcade

Orbt XL
Shared: Arcade · 2D · Action

Nova Drift
Shared: Action Roguelike · Arcade · 2D

BlazBlue Entropy Effect
Shared: Action Roguelike · 2D · Action

Skul: The Hero Slayer
Shared: Action Roguelike · 2D · Action

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

Talented
Shared: Action Roguelike · Retro · 2D

Run Build Pew!
Shared: Action Roguelike · Top-Down Shooter · Space

Rogue Legacy
Shared: Action Roguelike · 2D · Action

Cyberhunt
Shared: Arcade · Action · 2D

Downwell
Shared: Action Roguelike · Arcade · 2D

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

EVERSPACE™
Shared: Action Roguelike · Space · Action

FTL: Faster Than Light
Shared: Space · Perma Death · Indie

Megabonk
Shared: Action Roguelike · Arcade · Action

SNKRX
Shared: Action Roguelike · Top-Down Shooter · Arcade

Glyphica: Typing Survival
Shared: Action Roguelike · Top-Down Shooter · Arcade

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

Boneraiser Minions
Shared: Action Roguelike · 2D · Arcade