Starvoxel Defender ★ Free · No ads
iOS & Android Solo · Online Co-op · 5 Biomes

Merge. Defend. Together.

A chunky co-op merge tower defense. Drop defenders, 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. Free, no ads; optional purchases.

Actual Starvoxel: Defender gameplay in Nebula Drift with both co-op lanes active
Actual gameplay

This is what the released game looks like.

Direct Nebula Drift battle frames captured from the current mobile gameplay trailer—not concept art or a mock-up.

Released mobile footage
Actual Starvoxel: Defender Nebula Drift gameplay at wave 1
Wave 1Both lanes begin defending.
Actual Starvoxel: Defender Nebula Drift gameplay at wave 5
Wave 5The shared defense takes shape.
Actual Starvoxel: Defender Nebula Drift gameplay at wave 10
Wave 10A stronger board under pressure.
The merge

Fuse two of a kind. Watch it climb.

Every defender 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

Fifteen defender families, each fighting its own way — with boss-only waves testing every build.

Current Starvoxel: Defender store artwork showing defender merging and final-form Evolutions
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.

Current Starvoxel: Defender store artwork showing a co-op boss battle with two allied lanes protecting one shared base
Global ranking

Master every battlefield.

Clear all 60 waves across five biomes and unlock harder difficulties one by one. The global leaderboard ranks commanders by their highest difficulty first, then by the maximum wave they cleared.

  • Difficulty-first ranking
  • Live leaderboards
Current Starvoxel: Defender store artwork showing its five increasingly difficult battlefields
Collect & climb

Open packs. Level your arsenal.

Crack packs for defender parts, strengthen the families you love, and push your account level. The Crystal Constellation Battle Pass adds free and optional Premium rewards while you play. Add friends by username and pull them straight into an online co-op run.

  • Pack drops
  • Profiles & avatars
  • Friends by username
Current Starvoxel: Defender store artwork showing the defender collection and rarities

Pick a lane. Start defending.

Free to play · No ads · iOS & Android