You can play additional games using a microSD card.
Brad's Deals Editor Michael,
The Sega Genesis Ultimate Portable Game Player drops from $59.99 to $39.99 at Groupon Goods. Plus, the shipping is free. Elsewhere, the lowest price we found for one was $49.99. It has a 3.2" screen, five hour re-chargeable battery life, and comes with 80 classic Sega Genesis games like Mortal Kombat I-III, Sonic the Hedgehog I-II, Vectorman, and the ability to download and install more games via it's microSD card. Sales tax is charged in most states.