You will need to download at least 1 game to get this.
There are 3 different medal types in each game:
1) Point Buster: Beat a preset score.
2) Survivalist: Beat a preset time.
3) Time Spender: Play a certain amount of time.
Each medal type has a Bronze, Silver, and Gold medal. Win at least a Bronze medal of any type in 1 game to unlock this achievement.
----Details about Medals----
1) Point Buster: Beat a preset score.
-Each game has a preset score it intends for you to beat. Play the game, beat the score, and you'll win your medal. If you only unlock the Bronze medal, it will then display the next score you need to win to get to Silver.
2) Survivalist: Beat a preset time.
-Each game has a preset time it intends for you to survive during the game without losing. Play your best, and at the end of your game it will show you how long you played total in that one playthrough. If you only unlock the Bronze medal, it will then display the next score you need to win to get to Silver.
3) Time Spender: Play a certain amount of time.
-This is accumulative of all your play time on one game. Just play the game lots and lots and it will unlock, no matter how much you rock or suck at the game.