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