Nights HD includes Christmas Nights, arrives October 2 on PSN and October 5 on XBLA
Nights Into Dreams HD and Sonic Adventure 2 will both cost $9.99 when they launch on XBLA and PSN this October. Both games in the "Sega Heritage Collection" will be available on PSN October 2, and on XBLA October 5.

Both games have extra content that will be exciting in varying levels, as well. Sonic Adventure 2 is upgradable with "Battle Mode" DLC for $3, which adds the GameCube-specific content including new maps and characters. And Nights includes "free access" to the content from Christmas Nights, the hard-to-find expansion disc that was only available through magazines and other special giveaways!

This article was originally published on Joystiq.