Liar. Parallels will run on any Mac with an intel-chipset, which means it could run on my MacBook. (not pro)
Or someone could play paintball2 on their intel mac the free way, which is what I've done. Using BootCamp and rEFIt you can install a second operating system (e.g. Ubuntu Linux) and then Dual-Boot that and OS X, and play paintball2 natively to your OS within Linux or Windows, whatever you choose to install on your Mac.