Here is the full list of all 9 Retro Classix: Wizard Fire trophies - there are 5 bronze, 2 silver and 2 gold.
Play for at least 5 minutes.
You played for 30 minutes or more.
You played over one hour!
You spent more than 20 coins.
You invested at least 150 coins!
Play for a while with a friend.
Your score was high enough to make your character legendary.
You achieved a score higher than 50000 with at least one class and became a true hero!
You became a legend amongst all classes of heroes!