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