Single-player games like Galaxy Defenders (Classic TD)
Below are 8 single-player Steam games similar to Galaxy Defenders (Classic TD), ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Galaxy Defenders (Classic TD) page.
Ranked picks
- 1
Swarming Planet
Single-player alternative to Galaxy Defenders (Classic TD) — playable solo, no multiplayer required. Shares Strategy with Galaxy Defenders (Classic TD).
Build towers and learn abilities to defend against swarms of hundreds of on-screen hostile alien creatures. Choose between sets of randomized upgrades that both upgrade you and the alien swarm. From enormous explosions to far-reaching flamethrowers, no two games are the same.
- 2
Automatrons - Tower Defense
Single-player alternative to Galaxy Defenders (Classic TD) — playable solo, no multiplayer required. Shares Strategy and Indie with Galaxy Defenders (Classic TD).
Join our machine legion to conquer the world.
- 3
AGE OF ALIENS
Single-player alternative to Galaxy Defenders (Classic TD) — playable solo, no multiplayer required. Shares Strategy and Casual with Galaxy Defenders (Classic TD).
On an alien world, you must defend yourself in this unique base-building tower-defense game. Build a base by placing blocks, turrets and traps in order to survive the hoards of aliens.
- 4
Towership Defender
Single-player alternative to Galaxy Defenders (Classic TD) — playable solo, no multiplayer required. Shares Casual with Galaxy Defenders (Classic TD).
A single-tower defense game. Engine failure has made our ship stationary. Shoot down the bugger fleet and collect their fragments to upgrade your weapons, then use rare drops for permanent upgrades between runs. Unlock special weapons and deploy defenders to face down endless waves of alien ships.
- 5
Tanks Etc.
Single-player alternative to Galaxy Defenders (Classic TD) — playable solo, no multiplayer required. Shares Strategy and Casual with Galaxy Defenders (Classic TD).
Tanks Etc. is a modern reimagining of co-op overhead arcade classics; it offers classic gameplay while adding in depths of strategy to keep players reinventing strategies for waging war with their friends.
- 6
XENOBREAKERS: Classic Tower Defense
Single-player alternative to Galaxy Defenders (Classic TD) — playable solo, no multiplayer required. Shares Strategy and Indie with Galaxy Defenders (Classic TD).
Defend Billy and his crew on their way to the extraction zone! You have been authorized to use the defense system. Protect them from giant bugs, malfunctioning droids and more...
- 7
ARC Alien Raid Combat
Single-player alternative to Galaxy Defenders (Classic TD) — playable solo, no multiplayer required. Shares Strategy and Indie with Galaxy Defenders (Classic TD).
A game based on the classic Tower Defense style, assemble your best combination to overcome obstacles, can you do it?
- 8
Million Star Ship
Single-player alternative to Galaxy Defenders (Classic TD) — playable solo, no multiplayer required. Shares Strategy and Indie with Galaxy Defenders (Classic TD).
This is a single player defense game for interstellar strategy. We have established 36 birth points. Players can freely switch birth points to control the size of the enemy. Set the moon as a base. Our fleet can conquer the universe and find legendary warships. Our journey is the sea of stars.