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