Full list of all 10 DOOM 64 trophies - 4 bronze, 5 silver and 1 gold. It takes around 1-2 hours to unlock all of the trophies on PlayStation 4.
Acquire all 3 Demon Key Artifacts in the main campaign
Locate the secret level 'Hectic'
Discover a secret area
Finish a 'Fun' Level
Kill a Cyberdemon
Defeat the Mother of All Demons on The Absolution
Find the Unmaker
Find the BFG9000
Finish the Lost Levels mission
Finish 'No Escape' on Watch Me Die skill level