ENDLESSBASTION
One tower · Endless waves · Upgrade forever
An idle, incremental tower defense built around a single keep. It fires on its own while enemies close in from every side. Every upgrade is a decision made while the fight is still on.
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Every run builds the next one
Upgrade while enemies attack
Combat keeps running when you open the upgrade sheet. Buy damage, attack speed, range, critical hits, multishot, ricochet and health while enemies are closing in. Your keep changes as it grows, from rising stonework to a brighter crystal crown.
Fall, bank shards, return stronger
Cash and run upgrades reset when the keep falls. Shards stay with you. Spend them in the Workshop on permanent upgrades so every run pushes farther, and unlock 12 arenas, from Forest and Desert all the way to the Sky Citadel.
Build your own defense
Unlock the Tesla Coil, Mortar, Ballista, Flamespout, Prism and Spiked Flail. Add a Bastion Wall to hold enemies back. Bring two companions into the fight: Raincloud slows and strikes, Dust Devil pushes, Frost Sentinel freezes, Magma Hound leaves burning pools, Vine Snare roots packs in poison and Exit Sign sends them back to the edge.
Bosses that test the build
Each new ground brings tougher enemies, a new look and a higher shard payout. A boss arrives every ten waves, and the frontier only moves if your keep holds.
Research through combat
Research advances from kills while you play, not from a countdown timer. Open more slots as you reach milestones.
Idle shards between runs
A completed run keeps earning shards while the game is closed, with a 12-hour offline window that research extends.
Back to the frontier fast
Speed controls and Onslaught carry you across ground you have already cleared, so every session starts where it matters.
More to chase
Daily contracts, a bestiary to fill, a best wave on every arena, achievements and leaderboards.
Straight from the game
Real frames from the shipping build. Portrait on phones, landscape on tablets.
Hold the line
No energy timers. No lives to refill. Ads are optional rewards you choose to watch. The fight is yours to build, one wave at a time.