To clarify, the cartridge contains Defender, Joust, Sinistar, and Robotron 2084. How much you enjoy the cartridge basically depends on how much you enjoy shmups, jousting, and weirdly-controlled robot-exploding (the arcade game used two sticks, making it difficult to port to a system with only four face buttons, counting select and start - I haven't played it in a while, but I believe it either uses the shoulder buttons to spin the gun or just fires in whatever direction you're moving, both options being kind of hard to control; however, if Geometry Wars: Galaxies is any indication, a DS version would most likely play very well).