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