Half-Life
Fuse it. Deliver it. Before it rots.
Score0
Best0
⚡ Energy60
1⚡ per moveStreak ×1
Reactor wants
≥ Li
Meltdown in 16 moves
Phase 1 · 0 delivered · move 0
Fuel: H He
Arrows / WASD / swipe.
Space = wait (3× a move). N = new.
How to play
- Slide tiles. Two of the same fuse into the next one up: H → He → Li → C → O → Fe → Au.
- Every tile has a clock (the small number). Each move ticks it down. At 0 the tile decays one step down and gets a new clock. Fusing gives a fresh clock. Heavy elements decay fastest.
- H at 0 turns into Lead (Pb). Lead can't fuse. Two Leads that bump cancel out. Lead also crumbles on its own after 10 moves.
- The ⚛ reactor is the bottom-right cell. Land what it wants (or better) there and it's delivered: you get ⚡ and points. One step too small just sits there and blocks the reactor until you move it. Two or more steps too small gets burned: a little ⚡ back, no points. Lead there gets recycled for +3⚡.
- Meltdown clock. The reactor must be fed. The ⏱ on it counts down every move (Wait too). A delivery resets it. Hit 0 and you lose 25⚡.
- Rot costs. When a built tile (He or bigger) rots a step, you lose 1⚡. A messy board bleeds you.
- Phases. Every few deliveries the reactor wants a heavier element. The fuel that drops gets heavier too, moves cost more ⚡, the meltdown clock gets shorter, and your energy tank shrinks. Phases 2 and 3 give +10⚡. Nothing after that.
- It never stops. After gold, a new phase every 6 deliveries. Same gold target, but each one: +1⚡ per move, clock 1 shorter (min 5), tank 10 smaller (min 50), and more Lead drops (+5%, max 30%).
- Streak. Back-to-back deliveries multiply points: ×1.25, ×1.5, ×1.75, then ×2. Burning a tile or waiting resets it.
- Every move costs ⚡ (see the counter). Wait (⏳) costs 3× a move, ticks every clock including meltdown, spawns nothing. Hit 0⚡ and the run is over.
- Big elements pay big, but their clocks run fast. Plan the exit before you fuse.
| Phase | Wants | Fuel drops | Per move | ⏱ Clock | Tank | Starts at |
|---|---|---|---|---|---|---|
| 1 | Li | H He | 1⚡ | 16 | 100 | start |
| 2 | C | H He Li | 1⚡ | 13 | 90 | 3 delivered |
| 3 | O | He Li C | 2⚡ | 11 | 80 | 7 delivered |
| 4 | Fe | Li C O | 3⚡ | 9 | 70 | 12 delivered |
| 5 | Au | C O Fe + Pb 5% | 3⚡ | 8 | 60 | 18 delivered |
| 6+ | Au | more Pb | +1 each | −1 each | −10 each | every 6 |
| Deliver | Li | C | O | Fe | Au |
|---|---|---|---|---|---|
| Energy | +10 | +14 | +22 | +30 | +40 |
| Points | 100 | 300 | 800 | 2000 | 5000 |