iOS gamers: You can now do your part to donate to Red Cross for Tsunami relief efforts in Japan by downloading any Sonic the Hedgehog title and/or Street Fighter IV for iPhone or the iPod touch. Sega’s games include Sonic Spinball ($0.99), Sonic the Hedgehog ($1.99), Sonic the Hedgehog 2 ($2.99), and Sonic the Hedgehog 4th Episode 1 ($3.99) — 100% of the proceeds from any downloads through March 20th will be given to Red Cross’ Disaster Relief in Japan. Similarly, Capcom cut the price of Street Fighter IV to $0.99, and all of revenues from downloads through March 22 will be given to charity in Japan. We haven’t had a chance to play any of the Sonic titles, but we’ll be downloading a few today. Street Fighter IV takes us back to our Sega days, though, and it’s definitely worth a download. Hadouken!