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