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