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