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