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