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