Single-player games like OTTTD
Below are 17 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
Descending Darkness
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
Descending Darkness is a multiplayer PvE shooter, your goal is to defend a mysterious bunker you wake up in. In order to accomplished that, you are given multiple ways of playing. Choose your style of playing to defend engines of the bunker and keep systems running!
- 2
Ancient Wars: Sparta HD
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
Relive the epic battles between Spartans, Persians, and Egyptians in Ancient Wars: Sparta HD. Enjoy HD graphics, asymmetric civilizations, enhanced campaigns, new maps, smarter AI, and a revamped multiplayer mode. Forge your empire, master warfare, and make history in the Ancient World!
- 3
Ambusher
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
Ambusher is a tower defense game. Set your traps. Build your towers. Prepare your defense and survive until sunrise.
- 4
CHAOTIC ERA
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
AT THE LIMITS OF EARTH, AT THE EXTREMITY OF HEAVEN. A REAL-TIME STRATEGY NIGHTMARE.
- 5
Protect My Cheese
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
A stunning and chaotic tower defense strategy game where we play as cats to defeat the cheese-hungry rats. Survive against waves of enemies and guard the cheese.
- 6
Nuts Protocol
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
You might think this is yet another Tower Defense game. Well, friend, you are not wrong! The twist? It's fast-paced! Your greatest resource is positioning - and moving around is a must. Also, you control an orange Squirrel equipped with more-than-military-grade turrets! OMG - can it get any better?
- 7
Space Cube Tower Defense
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
You control a space station in the form of a cube that protects the planet from invaders.
- 8
Guardians of Hyelore
Single-player alternative to OTTTD — playable solo, no multiplayer required. Shares Strategy and Indie with OTTTD.
Guardians of Hyelore is an action-packed unit recruitment game pitting your units and strategies against an onslaught of enemies. Hire units, improve your troops, earn achievements, and spawn your Guardian to fight 150+ unique enemies in this exciting take on the army-spawning action genre.
- 9
Onslaught
Single-player alternative to OTTTD — playable solo, no multiplayer required.
This game features a highly dynamic background soundtrack, offering players an intense and thrilling challenge.
- 10
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.
- 11
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!
- 12
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!
- 13
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)!
- 14
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?
- 15
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
- 16
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.
- 17
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.