Single-player games like OTTTD
Below are 16 single-player Steam games similar to OTTTD, 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 OTTTD page.
Ranked picks
- 1
Defend Your Life: TD
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
Defend Your Life! Is tower defense set in human body where players are fighting against villain hordes of viruses and bacteria. Levels and units correspond to reality of human anatomy.
- 2
D.O.T. Defence
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy with OTTTD.
Welcome to the frontlines! Build towers, muster armies, and conquer the map. Challenge yourself in the single-player campaign following the Chroma Wars, survive relentless waves in solo defense, or battle it out in local matches against friends and AI bots. Victory comes with the last HQ standing!
- 3
Infested Planet
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.
- 4
Swords and Soldiers HD
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
Rewrite history as you take control of the brutal Vikings, the devious Aztecs or the crafty Chinese in their global quest to win the favour of the Gods! Swords & Soldiers is a side-scrolling strategy game that lets you control an entire army and lets you wield devastating magical abilities.
- 5
Orcs Must Die!
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
Slice them, burn them, skewer them, and launch them - no matter how you get it done, orcs must die in this fantasy action-strategy game from Robot Entertainment.
- 6
Octogeddon
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
You ARE Octogeddon, a massive mutant octopus with one mission: DESTROY the world! Grow more tentacles and evolve each of them into deadlier and deadlier weapons until you become the ultimate eight-legged killing machine!
- 7
McDROID
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
Farm, Build, Defend, in the Galaxy's only Arcade-Tower-Defense.
- 8
Hexguardian
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy with OTTTD.
Hexguardian is a roguelite, tower defense game where you build your own maps with hexagonal tiles! Build and upgrade towers, recruit armies, learn spells, construct wonders and place hexagonal tiles to create a path to enhance your defenses. With plenty of game modes and talents to unlock!
- 9
Moving Out
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Indie with OTTTD.
Moving Out is a ridiculous physics-based moving simulator that brings new meaning to "couch co-op"! Are you ready for an exciting career in furniture? As a newly certified Furniture Arrangement & Relocation Technician, you’ll take on moving jobs all across the busy town of Packmore.
- 10
LEGO® Party!
Single-player alternative to OTTTD — playable solo, no multiplayer required.
LEGO® Party! is a 4-player party game that's built different! Compete against your friends in wacky Challenge Zones and 60 hilarious minigames from across your favorite LEGO sets like Pirates, Space, NINJAGO® and more. Play your way! Join your friends no matter their platform locally or online!
- 11
Death Squared
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Indie with OTTTD.
Death Squared is a co-op puzzle game about cooperation, communication, and robot explosions. You should buy it!
- 12
Moving Out 2
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Indie with OTTTD.
Moving Out is back and wackier than ever, and now with ONLINE PLAY! Return to Packmore and use your moving skills across brand new dimensions and some old favourites. Help rebuild Smooth Moves and become an all-star F.A.R.T. (Furniture Arrangement & Relocation Technician)!
- 13
One More Line
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Indie with OTTTD.
ONE MORE LINE is a highly addictive, one button, space disco, skill timing game! Steam edition features 2-4 player local multi-player and no advertising. All for a very low price! Can you put a price on fun though?
- 14
RISK: Global Domination
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy with OTTTD.
Take over the world in RISK: Global Domination, the iconic strategy board game with 100+ original and classic maps and millions of players
- 15
No Way Home
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Indie with OTTTD.
Stranded in a strange galaxy, you must fight for survival using only your wits, your ship, and your party planning robot companion Matey. Explore the universe, befriend bizarre aliens, and blast through hordes of monsters as you endeavor to find a way home.
- 16
SPiNG
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Indie with OTTTD.
Experience the zen and skilful world of SPiNG. With only one button, swing through hundreds of hand-crafted levels in a joyful game of flow.