Fortify
Increases maximum HP cap — a passive ability in TUSG.io.
Fortify raises your maximum HP cap by up to 100%. Doubling your health pool changes what counts as a losing fight — bursts that deleted you now leave half a bar.
Type: Passive ability (always active)
Max level: 10
At max level: +100% HP Cap
Fortify stats per level
Abilities are permanent passives bought with ability points — no cooldowns, no activation, they simply always apply.
| Level | Cost | Total spent | Effect |
|---|---|---|---|
| 1 | 1 | 1 | +10% HP Cap |
| 2 | 3 | 4 | +20% HP Cap |
| 3 | 5 | 9 | +30% HP Cap |
| 4 | 7 | 16 | +40% HP Cap |
| 5 | 9 | 25 | +50% HP Cap |
| 6 | 11 | 36 | +60% HP Cap |
| 7 | 13 | 49 | +70% HP Cap |
| 8 | 15 | 64 | +80% HP Cap |
| 9 | 17 | 81 | +90% HP Cap |
| 10 | 19 | 100 | +100% HP Cap |
Is Fortify worth it?
Value scales with your healing: Fortify plus Emergency Heal is a bigger pool AND a bigger refill.
Play TUSG.io free — the browser survival io game with skills, bosses, loot and trading. No download, no install: jump into the arena now.