Carcinise This
Defeat the final boss in less than 15 seconds. Prepare damage you can apply promptly; waiting for the Cataclysm is a different objective.
Bosses
Final boss: choose the finish you need
A fast kill, a Cataclysm finish and a no-damage victory need different plans. Choose the target before the encounter so your attacks and survival choices do not invalidate it.
Five goals with different conditions
It was a dinosaur
The Cataclysm Event must kill the final boss. Damaging it beforehand is different from delivering the final blow yourself; keep the event’s finishing role intact.
Dove
Win without dealing damage during the run. A direct attack plan is incompatible with this condition even if it would finish the boss quickly.
Zen
Win without dealing or taking damage during the run. Surviving with some health left is insufficient, and recovering health does not erase an earlier hit.
Selective Pressure 20
Win a Pressure 20 run. A victory at a lower Pressure does not meet this condition; the goal itself does not require a 15-second kill.
These are the conditions listed on Steam. Check the current in-game entry for mode eligibility; the public wording does not establish every interaction between modes, passive effects and allies.
Prepare for the selected finish
For a fast-kill attempt, compare the damage you can actually apply during the opening with the time you lose repositioning. Choose the offensive route before entering, while leaving room to avoid attacks.
For a Cataclysm finish, avoid removing the boss’s remaining health with your own finishing attack. Plan movement for the event and check the duration and restrictions of a hiding or burrowing ability; the achievement wording does not establish a safe hiding duration.
For Dove or Zen, inspect passive damage sources as well as direct attacks. Do not assume that removing an attack button makes every equipped effect compatible. Use the dedicated achievement guide before adding a reflected-damage, poison or ally setup.
Meteor damage matters for Zen
The official 1.1 notes state that meteor damage is included in end-screen damage statistics and disqualifies Zen. A route that survives the meteor phase can still fail the achievement. Older advice that treats those hits as harmless to Zen should not guide the attempt.
If the achievement does not unlock
Compare the actual result with the selected condition: elapsed kill time for Carcinise This, the finishing event for It was a dinosaur, or damage dealt and received for Dove and Zen. Check the Pressure and mode too.
Keep a screenshot of the result and the game version when comparing attempts. A successful survival clip alone cannot prove the timer, finishing damage source or whole-run damage restrictions.
Sources and scope
Steam supports the goal conditions. The official 1.1 patch supports the meteor warning. These sources do not establish exact boss health, shield values, attack intervals or immunity windows, so no fixed values for those are assumed here.
FAQ
Can I combine the fast kill and pacifist objectives?
Plan them as different attempts. A direct-damage opening is useful when the goal is a kill under fifteen seconds, but dealing damage conflicts with Dove’s condition. Conversely, waiting for the Cataclysm Event does not demonstrate a fast kill. Choose the condition before selecting the run’s tools; a powerful attack can be the right choice for one objective and the reason another attempt is already invalid. Source
If Darwin takes a hit, is every final-boss goal lost?
No. Read the particular goal: Zen restricts both damage taken and damage dealt, while Dove restricts damage dealt. The fast-kill and Cataclysm conditions describe other requirements. This distinction helps decide what the run can still accomplish after a mistake. It does not prove that a particular mode or passive damage source is eligible; use the exact achievement wording alongside the result. Source
What should I compare after two different results?
Compare one objective at a time. For a missed speed goal, separate time spent reaching the boss from time spent attacking it; a large damage total cannot show when that damage landed. For a Cataclysm attempt, examine the finishing event. For Zen, include the meteor phase in the damage check. Changing all three goals between attempts makes it harder to identify which requirement failed. Source
Update history
: Added objective-by-objective comparisons for a fast kill, Cataclysm, Dove and Zen. Clarified which damage restriction applies after a hit and why the finishing event must be checked separately.