Full Game Walkthrough...

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
52 Card Pickup	Collect 52 key cards.
Almost there	Complete two areas.
Apocalypse	Kill hundred Zombies.
Armory	Unlock all weapons.
Augmented Reality	Pick up 200 augments.
Big Spender	Use the slot machine 77 times.
Bug free	Kill the first boss of area 2.
Bullseye	Hit 200 times enemies' weakspot.
Catharsis	Third encounter with the Sin Seeker.
Change of heart	Defeat the final boss of area 2.
Demolition Man	Destroy 130 crates.
Elusive target	Roll 180 times.
Epilogue	Complete all areas.
Familiar Faces	Defeat your first marine.
First Blood	Defeat your first darkphage.
Fully Charged	Unlock all bioboost upgrades.
I'm Rich!	Gather thousand credits.
Is it dead...?	Kill the first boss of area 1.
Just a humble beginning	Complete first area.
Kickoff Specialist	Kick fifteen explosive barrels.
Loaded Up	Pick up twenty weapons.
Mercyful	Second encounter with the Sin Seeker.
Motherless	Kill the final boss of area 1.
Nemesis	First encounter with the Sin Seeker.
One-Man Army	Kill hundred Jocaste's troops/robots.
Pest Control	Kill hundred Darkster Larvaes.
Rookie Run	Complete your first run.
Secret Stalker	Find five secret rooms.
Silent souls	Kill the first boss of area 3.
Stacked	Unlock all augments.
Sticky Situation	Kill seventy slimes.
Stomper	Kill ten Darkster Larvae with your kick.
Take them down	Kill eighty Darkster Drones.
The ONE above all	DEFEAT the final boss.
Too Powerful	Deal 200 damage with one attack.
Treasure Hunter	Open hundred chests.
Unlucky	Find thirty secret dead ends.
Upgraded	Unlock your first bioboost upgrade.
Veteran	Complete ten runs.
Walk In The Park	Kill twenty Nychoraptors.
Welcome aboard	Learn the basics.