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