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