Here is the full list of all 25 Kill It With Fire 2 achievements.
Collect every Compound X.
Collect every Upgrade Module.
Create every Blueprint.
Collect every Tape.
Kill every Morph Spider.
Brew every Potion.
Board the HSF Vindicator.
Defeat the sticky note spiders.
Complete the warehouse challenge in under 5 seconds.
Defeat a spider using the Hover Tank in the HSF Vindicator's hangar.
Better to reign in Hell than serve in Heaven.
Solve the hard version of Darwin's puzzle.
Damage a window on the HSF Vindicator.
Collect every fuel cell.
Lay the ghosts of Artois Manor to rest.
Listen to the ballad of Spike.
Blow up the Tricycle with C4.
Destroy City Hall using Laser Breath.
Have 5 jumping spiders crawling on you at the same time.
Read every issue of the Arachnitopia Times.
Clean all dirty objects.
Kill a spider with the Hairspray's alt-fire.
Create an army of undead spiders.
Collect 24 spiders in your vacuum.
Read all of Darwin's contract.