Capcom has released a new version of Street Fighter IV, called Volt Battle Protocol. One of the main novelties of this version is the ability to play against a friend via WiFi (and Bluetooth).
Furthermore, it has increased the number of fighters available to 17, including Vega, Balrog and Cody.
Its current price is 0.79 €, but it will increase day by day for 6 days, so it's a good time to purchase.
Available: App Store
Price: € 0.79 for a limited time