Zone 01 through zone 06
All six bosses
The Steam achievement feed has “Defeat Boss 01” through “Defeat Boss 06,” and a single public zone guide names the order as Gravaxis, Voidbug, Blockmaw, Trident, Voidweaver, IDRIS. Zone assignments after Gravaxis therefore rely on one guide; achievement descriptions establish numbered defeats, not those boss-name mappings. Global defeat rates from Steam on 6 Nov 2026 fall from 50.2% to 0.9%. The three-minute “decimated” set is separate achievements.
Gravaxis is the first. Public fight notes say you fill a stagger bar, use the stun, and pick up drops to heal. After Ascension, boss attacks throw tetherable chunks, so you are not hunting pillars for ammo. Hard Reset slowed Gravaxis and made some attacks easier to read. Blockmaw gained a close-range defense so it cannot be ground down, and its laser was made easier to read in 1.0 and Hard Reset.
Voidbug and Trident do not have a move list in the cited public notes. The spelling Idris is supported by Steam achievement text; IDRIS capitalization appears in the cited zone guide. Elites listed by that guide include Fortist, Ironclad, Voidout, Dominion, Helix, Sentry, Mutt, Trixiom, Defender, and Ranger, plus Voltaic, Shielded, and Frozen variants.
| Zone | Boss | Defeat % | Under 3 min % | What is public | Status |
|---|---|---|---|---|---|
| 01 | Gravaxis | 50.2 | 4.4 | End of Zone 01 (towering spiked machine in a domed arena) | 2 sources |
| 02 | Voidbug | 34.2 | 2.4 | End of Zone 02 | 2 sources |
| 03 | Blockmaw | 28.3 | 1.6 | End of Zone 03 | 2 sources |
| 04 | Trident | 10.8 | 1.6 | End of Zone 04 | 2 sources |
| 05 | Voidweaver | 4.8 | 1.2 | End of Zone 05 (ASCENSION) | 2 sources |
| 06 | Idris / IDRIS | 0.9 | 0.9 | End of Zone 06, the 1.0 finale | 2 sources |
| Name | Kind | What public notes say | Status |
|---|---|---|---|
| Fortist | elite | Summons adds; summons are destroyed on the owner's death (HARD RESET) | 1 source |
| Ironclad | standard | New enemy added with Zone 05 | 1 source |
| Voidout | standard | New enemy added with Zone 05 | 1 source |
| Dominion | standard | Aerial enemy with dimension-phasing abilities | 1 source |
| Helix | standard | Aerial bombardier that rushes the player on death | 1 source |
| Sentry | standard | Non-arena enemy that lurks underground and strikes unexpectedly | 1 source |
| Mutt | standard | Smaller, nimbler hound variant with a powerful forward leap | 1 source |
| Trixiom | standard | Aerial enemy that releases projectiles when damaged | 1 source |
| Defender | standard | Melee attacker; running and sliding animation bugs fixed in 1.0 | 1 source |
| Ranger | standard | Ranged attacker; melee attack bug fixed in 1.0 | 1 source |
FAQ
How many bosses are there?
Six. One per zone, zones 01 through 06.
How do I beat the first boss?
Gravaxis: build stagger with debris, grenades, and the tether, then shoot during the stun and pick up the heal. That sequence is from public fight notes, not a frame-by-frame I recorded.