Full list of all 27 Duke Nukem 3D: 20th Anniversary World Tour achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Kill 10 bad guys in 10 seconds while on steroids.
Complete "Alien World Order" on any difficulty.
Kill a Firefly Trooper while it's flying small.
Find Sam in "Mirage Barrage".
Burn 50 bad guys to death.
Use the Incinerator
Use the hookah in High Times.
Complete "The Birth" on any difficulty.
Kill 1000 enemies.
Finish any level on "Damn, I'm Good" difficulty.
Complete "Shrapnel City" on any difficulty.
Step in a pile of excrement.
Carry all weapons with ammo at once.
Complete "Lunar Apocalypse" on any difficulty.
Find Luke in the Level "Lunar Reactor".
Kill 5 bad guys with one shot.
Step on 40 enemies after using the Shrinker on them.
Complete "L.A. Meltdown" on any difficulty.
Find 70 secret areas.
Find any secret level.
Find the Doomguy in the Level "Death Row".
Tip an exotic dancer.
Kill every enemy on a level.
Use a cheat code.
Finish the "Hollywood Holocaust" level in under 3 minutes.
Find a secret area.
Listen to Developer Commentary (Use at least one trigger).