Single-player games like air star
Below are 9 single-player Steam games similar to air star, 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 air star page.
Ranked picks
- 1

Rogue Tower
Single-player alternative to air star — playable solo, no multiplayer required. Shares Strategy and Casual with air star.
Rogue Tower is a tower defense game with roguelike elements and a continuously expanding path which you can influence. Unlock, build, upgrade, expand, defend.
- 2

Idle Tower Defense
Single-player alternative to air star — playable solo, no multiplayer required. Shares Strategy and Indie with air star.
Idle Tower Defense is a game where you control a single tower to fight off hordes of enemies. No randomization. Choose from a variety of modules to create unique builds and upgrade modules and survive endless waves.
- 3

This Isn't Just Tower Defense
Single-player alternative to air star — playable solo, no multiplayer required. Shares Strategy and Casual with air star.
Defend your base with placeable towers that can be upgraded endlessly. Automate your production and make sure there's enough power to keep everything running.
- 4

All Aboard! The Train Defense Express
Single-player alternative to air star — playable solo, no multiplayer required. Shares Strategy and Indie with air star.
Protect the Infinite Power Generator by looping around the train tracks! Battle endless waves of enemies in this unique hybrid of auto-battler, survivor, tower defense, idle/clicker gameplay. How long can you survive?
- 5

castle idler
Single-player alternative to air star — playable solo, no multiplayer required. Shares Strategy and Casual with air star.
castle idler is a short, relaxing incremental tower defense game with no waves. upgrade towers, collect coins, and unlock powerful prestige upgrades to defend your castle.
- 6

Samawa Idle
Single-player alternative to air star — playable solo, no multiplayer required. Shares Strategy and Indie with air star.
Unleash the power of specialized towers to annihilate hordes of monsters in this idle game with roguelike elements. Collect gold, level up your towers, face powerful bosses, and refine your strategy with an evolving skill tree.
- 7

Necronator: Dead Wrong
Single-player alternative to air star — playable solo, no multiplayer required. Shares Strategy and Indie with air star.
Necronator: Dead Wrong is a deck-building roguelike with an RTS twist. Build a powerful deck. Collect and deploy undead units and raise a unique army. Master each commander’s playstyle and conquer the world. Change the game with rule-bending relics. Unlock new decks and do it all again.
- 8

Profit Sea Incremental
Single-player alternative to air star — playable solo, no multiplayer required. Shares Indie and Casual with air star.
A short incremental game about fishing, earning gold, and unlocking powerful upgrades to dominate the waters.
- 9

Bunny Hill
Single-player alternative to air star — playable solo, no multiplayer required. Shares Indie and Casual with air star.
Carve the slopes of the Bunny Hill on your skis in this fast paced physics racing game. With up to 8 player Online Multiplayer, dodge bushes and tag flags on randomly generated maps to reach infinite scaling speed with your friends.