Free games like Oasis Defense
Below are 8 free-to-play Steam games similar to Oasis Defense, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Oasis Defense page.
Ranked picks
- 1
The Riftbreaker: Prologue
Free-to-play alternative to Oasis Defense — no purchase or trial window. Shares Strategy and Indie with Oasis Defense.
The Riftbreaker: Prologue allows you to experience the events taking place before the story campaign of the main game. Explore an entirely new world. Gather resources. Build up a base. Defend yourself from thousands of alien creatures.
- 2
Bloons TD Battles
Free-to-play alternative to Oasis Defense — no purchase or trial window. Shares Strategy with Oasis Defense.
Go head to head with other players in a Bloon-popping battle for victory. From the creators of best-selling Bloons TD 5, this all new Battles game is specially designed for multiplayer combat, featuring the ability to control bloons directly and send them charging past your opponent's defenses.
- 3
Kingdom: Classic
Free-to-play alternative to Oasis Defense — no purchase or trial window. Shares Strategy and Indie with Oasis Defense.
Kingdom is a 2D sidescrolling strategy/resource management hybrid with a minimalist feel wrapped in a beautiful, modern pixel art aesthetic.
- 4
Yet Another Zombie Defense
Free-to-play alternative to Oasis Defense — no purchase or trial window. Shares Strategy and Indie with Oasis Defense.
Darkness is coming. How long can YOU survive? Build your base by day, defend it by night. Play in online or local co-op. Stay alive as long as you can.
- 5
Realm Grinder
Free-to-play alternative to Oasis Defense — no purchase or trial window. Shares Strategy with Oasis Defense.
Grow your realm, build alliances, and explore one of the deepest idle RPGs ever!
- 6
Zero-K
Free-to-play alternative to Oasis Defense — no purchase or trial window. Shares Strategy and Indie with Oasis Defense.
With 100+ truly unique units, Zero-K is an RTS of freedom and creativity, tempered by a decade of refinement. Sculpt land into a castle and throw invaders off it with a Jugglenaut. Explore a massive campaign, solo or co-op. Hop online for epic 32 player battles or fast paced 1v1, on 100s of maps.
- 7
Time Clickers
Free-to-play alternative to Oasis Defense — no purchase or trial window. Shares Indie with Oasis Defense.
Time Clickers is what's called an 'incremental game'. There's always a fun upgrade to look forward to, and the numbers keep getting bigger! Hire a team to fight for you, even when you're offline!
- 8
Infinitode 2 - Infinite Tower Defense
Free-to-play alternative to Oasis Defense — no purchase or trial window. Shares Strategy and Indie with Oasis Defense.
Infinitode 2 - a strategy in the Tower Defense genre, in which the player will have to build towers to protect his base from endless waves of enemies. The game features huge maps, lots of towers, resource miners, upgrade tree and map editor.