Starvoxel Defender ★ Free · No ads
iOS & Android Solo · Co-op · Ranked PvP

Merge. Defend. Together.

A chunky co-op merge tower defense. Drop turrets, fuse two of a kind up the rarity ladder to Legendary, and hold the grid with a friend on one shared health bar.

Play solo any time — an AI ally holds your second lane while you learn the grid. No ads, no pay-to-win.

The merge

Fuse two of a kind. Watch it climb.

Every turret starts Common. Merge a matching pair and it jumps a tier. Reach Legendary and it can evolve mid-battle into one of three specialist forms — each with its own trick.

  • Blaster
  • Laser
  • Tesla
  • Cryo
  • Missile
  • EMP
  • Flak

Seven turret families, each fighting its own way — and a boss crashes in every fifth wave.

Arsenal card for a Legendary Tesla turret showing its stats and three battle evolutions: Chain Overload, Arc Reactor and Tempest Coil
Co-op

Two lanes. Two players. One heart.

You defend the bottom lane, your partner defends the top — and you share a single health bar. One leak hurts you both, so every merge and every mine counts. Team up in real-time online co-op, or hold both lanes solo with an AI ally.

Starvoxel: Defender home screen with Online Co-op, Solo, ranked PvP Duel and Friends options
Ranked PvP

Duel for the top of the board.

Get matched against another commander for a fast head-to-head. Send minibosses charging down their lane, outlast theirs, and move your Elo. Claim a username to enter the global leaderboards and chase the crown.

  • Global Elo ranking
  • Live leaderboards
Ranked PvP leaderboard listing players by Elo rating with gold, silver and bronze medals and the player's own rank highlighted
Collect & climb

Open packs. Level your arsenal.

Crack packs for turret parts, pour them into the families you love, and push your account level. Add friends by username and pull them straight into a co-op run or a friendly duel.

  • Pack drops
  • Profiles & avatars
  • Friends by username
Pack-opening screen revealing turret cards across rarities from Common to Legendary

Pick a lane. Start defending.

Free to play · No ads · iOS & Android