Currently the most active source for physical DVD-ROMs. Prices generally range from $9.89 to $25.00 depending on whether the game is used (CIB) or factory sealed.
If you are looking to download the PC game today, you will find it is significantly harder to acquire than a modern title. Due to expired licensing agreements between the publisher, Sega, and Marvel, the game is no longer available for purchase through official digital storefronts. Official Availability and Legal Status Download Iron Man PC Game 2008
The only verified legal way to play the 2008 Iron Man game on PC is to purchase a . You can find these on secondary marketplaces where collectors sell used or "New Old Stock" (NOS) discs. Currently the most active source for physical DVD-ROMs