Here is the full list of all 28 Duke Nukem 3D: 20th Anniversary Edition World Tour trophies - there are 10 bronze, 11 silver, 6 gold and 1 platinum.
Completed all trophies for the game!
Kill 1000 enemies.
Step on 40 enemies after using the Shrinker on them.
Burn 50 bad guys to death.
Find 70 secret areas.
Kill 5 bad guys with one shot.
Kill 10 bad guys in 10 seconds while on steroids.
Find Sam in "Mirage Barrage".
Find the Doomguy in the Level "Death Row".
Find Luke in the Level "Lunar Reactor".
Kill a Firefly Trooper while it's flying small.
Use the hookah in "High Times".
Complete "Alien World Order" on any difficulty.
Listen to Developer Commentary (Use at least one trigger).
Complete "The Birth" on any difficulty.
Use the Incinerator.
Complete "Shrapnel City" on any difficulty.
Kill every enemy on a level.
Complete "Lunar Apocalypse" on any difficulty.
Finish a secret level.
Step in a pile of excrement.
Tip an exotic dancer.
Finish the "Hollywood Holocaust" level in under 3 minutes.
Finish any level on "Damn, I'm Good" difficulty.
Complete "L.A. Meltdown" on any difficulty.
Carry all weapons with ammo at once.
Use a cheat code.
Find a secret area.