Games like Starfall Defenders
Games like Starfall Defenders include Kingdom Rush - Tower Defense, Aliens: Dark Descent, Infested Planet, Ninja Kiwi Archive, and Kingdom Rush 6: Genesis TD. We matched them by the tags players give Starfall Defenders on Steam (Strategy, Arcade, Tower Defense, Action RTS, and Action): closest matches first, and among equally close ones the better-known games.

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · 2D

Aliens: Dark Descent
Shared: Strategy · Action · Singleplayer

Infested Planet
Shared: Strategy · Tower Defense · Action

Ninja Kiwi Archive
Shared: Arcade · Strategy · Tower Defense

Kingdom Rush 6: Genesis TD
Shared: Strategy · Tower Defense · Action

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

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

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

Defense Grid: The Awakening
Shared: Strategy · Tower Defense · Singleplayer

Halo: Spartan Assault
Shared: Action · Strategy · Singleplayer

FTL: Faster Than Light
Shared: Strategy · Space · Singleplayer

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Tower Defense · 2D

Thronefall
Shared: Strategy · Tower Defense · Action

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

STAR WARS™ Empire at War - Gold Pack
Shared: Strategy · Space · Singleplayer

Kingdom Rush Vengeance - Tower Defense
Shared: Strategy · Tower Defense · 2D

DG2: Defense Grid 2
Shared: Strategy · Tower Defense · Action

Heretic's Fork
Shared: Strategy · Tower Defense · Action

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · 2D

Reassembly
Shared: Strategy · Space · Action

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

Sid Meier's Civilization®: Beyond Earth™
Shared: Strategy · Space · Sci-fi

Door Kickers
Shared: Strategy · Action · Top-Down

Bloons TD 5
Shared: Strategy · Tower Defense · Action