Here is the full list of all 12 Dragon's Lair Trilogy trophies - there are 7 bronze, 4 silver and 1 gold.
Watch the entire Space Ace game
Dirk dies via asphyxiation in the bedroom scene
Complete Dragon's Lair on Arcade Mode
Lose your last life in the Drink Me scene... Watch Carefully!
Never make a correct move in a new game
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