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