Games like Harvest: Massive Encounter
Games like Harvest: Massive Encounter include Defense Grid: The Awakening, Creeper World 3: Arc Eternal, FTL: Faster Than Light, Bloons TD 6, and Plants vs. Zombies GOTY Edition. We matched them by the tags players give Harvest: Massive Encounter on Steam (Strategy, Indie, Tower Defense, Sci-fi, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Defense Grid: The Awakening
Shared: Strategy · Tower Defense · Sci-fi

Creeper World 3: Arc Eternal
Shared: Strategy · Tower Defense · Indie

FTL: Faster Than Light
Shared: Strategy · Indie · Sci-fi

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

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

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

X-Morph: Defense
Shared: Strategy · Tower Defense · Indie

Infested Planet
Shared: Strategy · Tower Defense · Indie

Dungeon of the ENDLESS™
Shared: Strategy · Tower Defense · Indie

Space Run
Shared: Strategy · Tower Defense · Indie

Taur
Shared: Strategy · Tower Defense · Indie

Cosmoteer: Starship Architect & Commander
Shared: Sci-fi · Singleplayer · Indie

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · Singleplayer

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

GemCraft - Chasing Shadows
Shared: Strategy · Tower Defense · Indie

Anomaly Warzone Earth
Shared: Strategy · Indie · Tower Defense

Orcs Must Die!
Shared: Strategy · Tower Defense · Indie

Plague Inc: Evolved
Shared: Strategy · Indie · Singleplayer

Kingdom Rush Frontiers - Tower Defense
Shared: Strategy · Tower Defense · Singleplayer

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

Kingdom Two Crowns
Shared: Tower Defense · Strategy · Singleplayer

Sanctum
Shared: Strategy · Tower Defense · Indie

Revenge of the Titans
Shared: Strategy · Tower Defense · Indie

Warhammer 40,000: Mechanicus
Shared: Strategy · Sci-fi · Singleplayer