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