Walking Dead Pro is deep, challenging and the code is phenomenal. You need to have a strategy from the get go. I've owned quite a few Sterns and this one by far I would deem the most complete. With the 5 basic modes , Barn, CDC, Riot (2x playfield), Tunnel and Arena to get you started, followed by Bicycle Girl which you can stack at the same time as the modes and with either Prison multiball or Well Mb. You can also in theory stack Prison MB, Bloodbath MB, Bicycle Girl and a basic mode. Woodbury shot for the extra ball is tough and rewarding. You also have Siege, Last Man Standing and Horde which are a real challenge on their own. Skill shots that actual require skill. The soundtrack is very good along with the art of the game. You can also if you want upgrade the sound with the TV show (someone here made a patch). This would be my first bet by a mile. Especially at the price point.

While some of the suggestions are good also remember that you could probably get two machines instead of one pending price point, unless space is an issue. As an example TWD and Baywatch, Met and High Speed...etc... instead of just WOZ