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