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