Single-player games like Undead Defense TD
Below are 9 single-player Steam games similar to Undead Defense 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 Undead Defense TD page.
Ranked picks
- 1
They Are Billions
Single-player alternative to Undead Defense TD — playable solo, no multiplayer required. Shares Strategy with Undead Defense TD.
They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?
- 2
Rebirth evolution
Single-player alternative to Undead Defense TD — playable solo, no multiplayer required. Shares Strategy with Undead Defense TD.
2D pixel style simulation business strategy game Build and operate your own survivor base, recruit and cultivate various professional combatants. Clear zombie strongholds, reduce regional infections, survive in the apocalypse, and establish your own power.
- 3
Project Apocalypse
Single-player alternative to Undead Defense TD — playable solo, no multiplayer required. Shares Strategy with Undead Defense TD.
Build and defend your post-apocalyptic city in Project Apocalypse. Manage your survivor's needs, gather resources, and trade items to help them stay alive. See if you can create a thriving community in this harsh world.
- 4
After Long Night
Single-player alternative to Undead Defense TD — playable solo, no multiplayer required. Shares Strategy with Undead Defense TD.
After Long Night is a sandbox survival RTS. Build and fortify your base, scavenge every corner for vital resources, craft deadly weapons, and raise a militia to fight off relentless zombie hordes that strike every night. In this world, scavenging isn't just survival—it's strategy, power and war.
- 5
Quarantineer
Single-player alternative to Undead Defense TD — playable solo, no multiplayer required. Shares Strategy with Undead Defense TD.
For the glory of Motherland, the truth shall never be revealed. None of us expected this, Yet history is repeating itself.
- 6
Final Outpost: Definitive Edition
Single-player alternative to Undead Defense TD — playable solo, no multiplayer required. Shares Strategy with Undead Defense TD.
Final Outpost is a survival strategy base-builder. You lead the last survivors of the apocalypse. Assign roles, craft tools, and manage resources carefully. Construct buildings, level up your citizens, and fortify your town against hordes of zombies. How many days can you survive?
- 7
After Inc: Revival
Single-player alternative to Undead Defense TD — playable solo, no multiplayer required. Shares Strategy with Undead Defense TD.
Can you rebuild civilisation after a zombie apocalypse? From the creator of Plague Inc. comes a unique blend of strategic simulation, survival city builder and ‘mini 4X’. Build settlements, harvest resources and shape society as you lead Humanity out of the darkness.
- 8
Infection Free Zone
Single-player alternative to Undead Defense TD — playable solo, no multiplayer required. Shares Strategy with Undead Defense TD.
Choose any real region from the world. Choose your base of operations, then rebuild and readapt the buildings around you to create a self-sustaining settlement. Take charge of a group of survivors from your city. And when the night falls - Defend the zone from the infected!
- 9
Whispers in the Shadows
Single-player alternative to Undead Defense TD — playable solo, no multiplayer required.
A Top-down Horror game, where light is your only weapon against the monsters lurking in the shadows. Keep your torch alive as you attempt to uncover the secrets hidden within the forest.