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