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