Single-player games like Iron Sea Defenders
Below are 18 single-player Steam games similar to Iron Sea Defenders, 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 Iron Sea Defenders page.
Ranked picks
- 1
Day D: Tower Rush
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Action and Sports with Iron Sea Defenders.
Onwards to the past! Learn the real power of science! Help the professor and his loyal companion deal with hordes of dinosaurs.
- 2
Winning Tactics
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Action and Sports with Iron Sea Defenders.
Your mission is to defend the castle, using its power to summon warriors at crucial moments of the battle
- 3
Road to Omaha: College Baseball Dynasty
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Sports and Strategy with Iron Sea Defenders.
A deep college baseball dynasty management sim where you build a program across endless seasons: recruit, set lineups and rotations, hire staff, manage schedules, develop players, and play or sim every game pitch by pitch. Can you become the greatest coach of all time?
- 4
Balloon Saga
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Action and Sports with Iron Sea Defenders.
Balloon Saga is a physics based game in which the player needs to solve logic problems and fly to the top of the mountain with the help of balloons. Control the objects using your mouse. Get stars for completing the levels successfully.
- 5
Esports History
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Sports and Strategy with Iron Sea Defenders.
Esports History is an RPG sim where you start as a regular guy, and work your way up to the very top of esports. Defeat bosses in tournaments, make a name for yourself within the esports community, and become a real pro!
- 6
How Much Items - Weapon
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Action and Sports with Iron Sea Defenders.
Game genre find hidden objects.
- 7
Hidden Western Frontier Top-Down 3D
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Action and Sports with Iron Sea Defenders.
Find the objects that are hidden on the map.
- 8
3D PUZZLE - Farming
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Action and Sports with Iron Sea Defenders.
Collect a 3D puzzle, transferring things to the right places to create a beautiful house.
- 9
Super Sanctum TD
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Sea Defenders.
Super Sanctum TD is a retro-styled Tower Defense game that focuses on strategy, customization and replayability. Build advanced mazes and construct powerful towers to prevent alien hordes from reaching the Core!
- 10
Dungeon Defenders
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Action and Strategy with Iron Sea Defenders.
Create a hero from one of four classes to save Etheria in this 4-player coop Tower Defense Action-RPG. Includes Steam exclusive Portal gun & TF2 familiars!
- 11
Kingdom Rush - Tower Defense
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Strategy with Iron Sea Defenders.
Get ready for an epic journey to defend your kingdom against hordes of orcs, trolls, evil wizards and other nasty fiends using a vast arsenal of towers and spells at your command!Fight on forests, mountains and wastelands, customizing your defensive strategy with different tower upgrades and specializations!
- 12
Gnomes Garden
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Sea Defenders.
Dry summer withered the king’s beloved garden and the surrounding gardens of the kingdom alike. The ruler has fallen ill and the kingdom is in danger. Help the princess save the gardens and make the king better again.
- 13
Royal Defense
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Sea Defenders.
The castle needs a hero – hordes of trolls are surrounding it! Build towers, save money, learn spells - don't let the enemy in! Follow the exciting story of the dwarven kingdom's eternal struggle against the troll hordes, who want only to crush the dwarves and claim their territory.
- 14
Fort Defense
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Sea Defenders.
All hands on deck! Pirate armada dead ahead! Take part in an uncompromising struggle repelling freebooters' assaults. Watch out, the enemy may catch the tide for ruining your fortress. Build towers, collect crystals, upgrade spells and believe in your victory!
- 15
Alice's Patchwork
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Strategy and Casual with Iron Sea Defenders.
Assemble patchwork mosaics while you travel with Alice and the famous characters of Wonderland and Looking-Glass Land
- 16
Alice's Patchworks 2
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Indie and Casual with Iron Sea Defenders.
Assemble patchwork mosaics, meet your favorite heroes from the world beyond the looking glass and help Alice become the queen!
- 17
Katy and Bob: Safari Cafe
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Strategy and Casual with Iron Sea Defenders.
Katy and Bob: a new chapter in the adventures of Katy and Bob. Head into the safari park and grow your business!
- 18
Mahjong World Contest (麻将)
Single-player alternative to Iron Sea Defenders — playable solo, no multiplayer required. Shares Sports and Strategy with Iron Sea Defenders.
Join a Mahjong contest. Complete over 100 unique levels to gain experience and points. Improve your rank and progress.