OMFG, you don't know what a modem is??? Lolz, as much as I understood, he wanted to say can you play the game on Internet. So, modem is for dial-up. Seems those super-fast connections got you a bit ****y, and made you forget about the common folk.
And to answer your question, I don't recommend to play any game on a modem, because of it's "amazing" capabilities. Oh, you know what I'm talking about.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem
• Unlimited Items and Ammo
• Unlimited Health