Here is the full list of all 12 Dragon's Lair Trilogy trophies - there are 7 bronze, 4 silver and 1 gold.
Collect the Butterfly Treasure
Dirk dies via asphyxiation in the bedroom scene
Watch the entire Space Ace game
Complete Space Ace in Ace Mode
Beat the Dogfight Scene in Ace Mode
Successfully complete Dragon's Lair, Space Ace and Dragon's Lair 2: Time Warp
Energize for the first time
Complete Dragon's Lair 2 in Director's Cut Mode
Collect all three treasures in the first level of Dragon's Lair 2
Lose your last life in the Drink Me scene... Watch Carefully!
Complete Dragon's Lair on Arcade Mode
Never make a correct move in a new game