This achievement is for getting the Beginner Stamp in each game. Most games have options for number of lives and a stage select setting to make it easier. You will need to use 'Return to Museum' for the badge to be awarded once you meet the requirements. The requirements are as follows.
Pac-Man: Watch Pac-Man Show - This is the very first 'skit' you watch at the end of level 2.
Pac-Mania: Earn 50,000 points - Fairly easy. If you need to you can change the number of lives and choose a harder starting level that will give you a 'courage bonus' once you complete the round.
Pac & Pal: Clear Bonus Stage - The bonus stage starts after round 2. You flip cards trying to get $ but not get ghosts. You do not need to perfect this stage, only end it.
Pac-Land: Clear Round 1 - Double tap
to run. Try to dodge ghosts as best you can. Once you reach the 'Break Time' sign, Round 1 will end and Round 2 will start.
Super Pac Man: Watch Pac-Man Show - Skit after level 2, the goal is to gather keys to unlock gates and grab the fruit. If you get a green pellet you will grow large and be able to break through the gates.
Pac-Attack: Reach Level 20 - The trickiest of the bunch. The only way to get better at this game is with practice. Similar to Tetris, your goal is to clear out the blocks in a line while eating any ghosts that get in the way. Every time you eat ghosts the Star Bar on the left side fills up, when it fills completely it will give you a fairy to clear out a number of ghosts below it. You have to start on Normal difficulty for this to count.
Pac Man Battle Royale: Earn 3 Victories - You have to win 3 seperate games, not just rounds. To make this easy you can use a second controller.
Pac-Man Arrangement: Watch Coffee Break - This skit shows up after finishing level 1-2
Pac-Man C.E.: Earn 100,000 Points - The number seems high, but is actually very low for C.E. Easily done in a 10 minute mode, doable in 5 minute mode as well. Do your best to eat as many ghosts as possible as this speeds up the game so you can clear more boards and get fruit worth more points. Also if you keep eating power pellets in quick succession your combo continues at it does not stop at 1600 like in the prior games.