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