Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Ceiling Slaughter	Kill 10 Gnaar on ceiling spikes in Amethystine Depths.
Dino's Best Friend	Rescue 3 dinosaurs by destroying their helmets.
Exterminator Sam	Kill a Giant Flea in Fireball Fury.
Fully Stacked	Create your first 6 gun stack.
Getting Serious	Beat the game on any difficulty.
Gnaar-body's Fool	Kill over 50 Gnaar in a single level.
Golden Boy	Unlock ALL golden guns.
Gun Aficionado	Find ALL guns.
Gun Collector	Find 16 guns.
I Heard You Like Parallax	Find the Monument to Parallax.
Laura Who?	Find all secrets.
Lumberjack Sam	Kill a Red Biomechanoid with only chainsaws.
Man with the Golden Guns	Unlock 2 golden guns.
Perfectly Perfect	Find or reach 100% levels, challenges, secrets, guns, and connectors.
Quad Power	Find all 4 of any gun type.
Quick and Not-so-Dead	Beat any level in under 2 minutes in its entirety.
Red Light Rendezvous	Find the Secret Red Light District.
Sepulcher Looter	Find 30 Secrets.
Seriously Nuts	Clear 8 Challenge levels.
Seriously Tough	Clear 2 Challenge levels.
Seriously Unstoppable	Clear ALL Challenge levels.
Skeletons in the Closet	Find mental's secret closet.
Speed Runner	Finish a level from the start at over 100% gameplay speed.
Templeton's Buddy	Help Templeton unlock his secret room in Amethystine Depths.
Time to Eat the Doughnuts	Eat one Boston Creme or Cannoli.
Timeline Correction	Replay any previous level.
Treasure Seeker	Find 10 Secrets.
Unflinching Sam	Beat any level without dying.
Untouchable Sam	Beat any level without getting hurt.
White Men Can Jump	Find the Jump Pad.