Games like Battle Survival in Space
Games like Battle Survival in Space include Vampire Survivors, Skul: The Hero Slayer, Megabonk, Rogue Legacy, and Risk of Rain (2013). We matched them by the tags players give Battle Survival in Space on Steam (Casual, Action, Arcade, Platformer, and Roguelike): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Casual · 2D

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

Megabonk
Shared: Roguelike · Action Roguelike · Action

Rogue Legacy
Shared: Platformer · Action · Roguelike

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

Spelunky
Shared: Platformer · Roguelike · Action Roguelike

Dead Cells
Shared: Roguelike · Action Roguelike · 2D

Downwell
Shared: Platformer · Arcade · Action Roguelike

BALL x PIT
Shared: Action · Arcade · Roguelike

Rogue Legacy 2
Shared: Arcade · Action · Platformer

Dungreed
Shared: Action · Action Roguelike · Roguelike

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

BlazBlue Entropy Effect
Shared: Action · Action Roguelike · Platformer

Broforce
Shared: Action · Platformer · 2D

Timberman
Shared: Casual · Action · Arcade

Halls of Torment
Shared: Action Roguelike · Action · Roguelike

Crab Champions
Shared: Action Roguelike · Arcade · Roguelike

Boneraiser Minions
Shared: Action Roguelike · 2D · Casual

Enter the Gungeon
Shared: Roguelike · Action Roguelike · Pixel Graphics

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

Super House of Dead Ninjas
Shared: Action · Platformer · Action Roguelike

Death Must Die
Shared: Action Roguelike · Action · Pixel Graphics

Katana ZERO
Shared: Action · Platformer · Pixel Graphics

Twin Shot Deluxe
Shared: Casual · Action · Arcade