Japanese gaming website Andriasang has shared details of how Sonic Generations for Nintendo 3DS will use the handheld’s StreetPass feature and we’ve listed the main points for you here.

– Players will be able to swap profile cards and missions via StreetPass.
– The game contains 100 extra missions which can be unlocked via StreetPass.
– “When you do a StreetPass exchange with another player, he or she will appear in your StreetPass log. Then you need to select the player’s name and you’ll receive a mission that the the player cleared.”
– “There’s a mission called Revenge which has you where taking out a certain number of enemies while Special Trial sees gopher-like enemies turning up in Act 1 of Mushroom Hill Zone.”
– If you’re not able to get enough StreetPass hits, there is also the option to unlock missions with game coins.
– You can list your Sonic fan credentials on your profile card and other details, like who your favourite Sonic character is.
– Your profile card will also record how long you’ve been playing Sonic Generations.
– Your profile card will update automatically when you perform an exchange.

Some screenshots of this feature have also been released by SEGA Japan and you can view them below.

Source: Andriasang (via ONM)

Thanks to CyberGW, Lip and interface for the heads up!