Grandmaster Greetings Trophy/Achievement for Lego Marvel Superheroes 2. To unlock the Grandmaster Greetings Trophy/Achievement you must Play “Capture the Infinity Stone” in “Grandmaster Mode” in Lego Marvel Superheroes 2. Once you unlock The Avengers Mansion, you should be able to play Capture the Infinity Stone Battle Arena game down in the basement. Simply head down […]