Games like 星河防线
Games like 星河防线 include Bloons TD 6, Sanctum 2, Rogue Tower, Orcs Must Die! 3, and Bloons TD 5. We matched them by the tags players give 星河防线 on Steam (Strategy, Tower Defense, 3D, Roguelite, and First-Person): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Strategy · Tower Defense · 3D

Sanctum 2
Shared: Tower Defense · Strategy · Sci-fi

Rogue Tower
Shared: Strategy · Tower Defense · 3D

Orcs Must Die! 3
Shared: Tower Defense · Strategy · 3D

Bloons TD 5
Shared: Strategy · Tower Defense · Action

SENTRY
Shared: Tower Defense · Strategy · Sci-fi

CloverPit
Shared: Strategy · Roguelite · First-Person

Orcs Must Die! 2
Shared: Tower Defense · Strategy · Action

Sanctum
Shared: Tower Defense · Strategy · Sci-fi

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · Casual

Thronefall
Shared: Strategy · Tower Defense · 3D

Orcs Must Die! Deathtrap
Shared: Tower Defense · Roguelite · Strategy

Dale & Dawson Stationery Supplies
Shared: 3D · First-Person · Casual

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · Action

Dota 2
Shared: Strategy · Action · Tower Defense

Dungeon of the ENDLESS™
Shared: Strategy · Tower Defense · Sci-fi

Starship Troopers: Extermination
Shared: First-Person · Sci-fi · Action

Emberward
Shared: Tower Defense · Strategy · Roguelite

Portal
Shared: First-Person · Sci-fi · 3D Platformer

Wall World
Shared: Roguelite · Tower Defense · Strategy

DG2: Defense Grid 2
Shared: Strategy · Tower Defense · Sci-fi

Cluckmech Oasis
Shared: Strategy · Tower Defense · Roguelite

We Who Are About To Die
Shared: Strategy · Roguelite · Action

Buckshot Roulette
Shared: Strategy · First-Person · 3D