Roguelite Hero — 12-Run Vampire-Survivors-Likes (3D)

What this is

An autonomous 3D bullet-heaven in the Vampire Survivors tradition — 8 heroes, 7 weapons each evolving into named ultimates, 6 passives, 3 cycling stages, 4 bosses, and meta-progression that persists across runs in localStorage. The autopilot picks an upgrade card every level-up and keeps moving. Each run ends with a summary modal. Then the next run starts. After 12 runs you've unlocked the entire roster including Mira and the Final Form.

Why this is mind-blowing

Watch the chronicle: Run 1 of 12. Aria the Sparkbinder. 0:00 → 1:05. 84 kills. Killed by Lord Cravenmaw the Bloated. Best weapon: Magic Bolt Lv 4. UNLOCKED: Tor the Stormcaller. Run 2 starts immediately. Tor's a different character with a different weapon and a different feel. By run 4 you've cycled stages — Crimson Crypt with lava hazards, Verdant Hollow with vines and fireflies, Frozen Vault with ice patches and snow particles. By run 8 you're evolving weapons — Lightning Chain becomes Heaven's Wrath when you also have Crystal Lens. By run 12 the Eternal Reaper spawns and there's a 40% chance Mira spawns to fight him.

550 enemies on screen via THREE.InstancedMesh. Boss with screen shake. 3/4 top-down camera following the hero. Boss zoom. Stage-tinted fog. It looks like a real bullet-heaven. And it runs forever.

Prompt

An autonomous 3D Vampire-Survivors clone. 8 heroes (Aria, Tor, Vale, Kestrel, Brynn, Zelth, Pip, Mira) each with unique color, starter weapon, and bonus. 7 weapons each evolving into named ultimates (Magic Bolt → Phoenix Cascade, Pulse Wave → Stellar Blossom, Orbiting Blades → Cyclone Dervish, etc.) when paired with the right passive. 6 passives (Crystal Lens, Whisper Tome, Iron Gauntlet, Stormwing, Swift Boots, Amulet of Veins, Hollow Lantern). 3 stages cycle every 75s — Crimson Crypt, Verdant Hollow, Frozen Vault — each with hazards, decor, and tinted fog. 4 boss spawns at 1/2/4/5 minutes (Lord Cravenmaw, The Murmuring Choir, The Iron Reaper, The Eternal Reaper). 550 enemies on screen via InstancedMesh. Auto-pick upgrade cards every level-up. Run summary modal with kills, time, killed-by, best weapon. Meta-progression persisted in localStorage. 12-run unlock track. Auto-start next run forever.

Paste this into Claude, Cursor, or Copilot. Change one thing that matters to you.

What I learned shipping it

InstancedMesh per enemy type → 550 simultaneous enemies at 60fps. One mesh per enemy would crater the GPU at 50.

Auto-picking upgrade cards after 1.3s freeze means the streamer doesn't see a stuck game on level-up — the autopilot keeps moving.

Meta-progression with localStorage gives stream viewers a reason to stay tuned: 'is THIS the run that unlocks Mira?' Each loop has progression stakes even though every individual run is the same length.