Games like Solar Defense
Games like Solar Defense include Ninja Kiwi Archive, Kingdom Rush - Tower Defense, Plants vs. Zombies GOTY Edition, X-Morph: Defense, and Bloons TD 6. We matched them by the tags players give Solar Defense on Steam (Action, Casual, Strategy, Tower Defense, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

Ninja Kiwi Archive
Shared: Casual · Strategy · Action

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

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

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

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

Cluckmech Oasis
Shared: Strategy · Tower Defense · Top-Down Shooter

Infested Planet
Shared: Action · Strategy · Tower Defense

Bloons TD 5
Shared: Strategy · Tower Defense · Action

Super Sanctum TD
Shared: Strategy · Tower Defense · Casual

Rock 'N' Roll Defense
Shared: Casual · Strategy · Action

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Tower Defense · Casual

The Escapists
Shared: Strategy · Pixel Graphics · Action

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

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

Hotline Miami
Shared: Action · Pixel Graphics · Top-Down

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

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

Halo: Spartan Assault
Shared: Action · Top-Down Shooter · Strategy

Vampire Survivors
Shared: Pixel Graphics · 2D · Casual

ShellShock Live
Shared: Strategy · Action · 2D

Timberman
Shared: Casual · Action · Pixel Graphics

UFO 50
Shared: Action · Pixel Graphics · Strategy

Sanctum 2
Shared: Tower Defense · Action · Strategy

Let Them Come
Shared: Action · Tower Defense · 2D