Since today is the kind of official Dreamcast Memorial Day, I give you a special edition of the Video Game Canon, focussing on the Sega Dreamcast Games on the list. Unfortunately, there is only one Dreamcast game on the list until now:

Phantasy Star Online: First (and most successful, all things considered) console MMO. Strong community for years (despite the haxx0rs) 'til the servers shutdown. Utilised real time combat instead of turn based which was unusual for the genre. Gave the Dreamcast its first true killer app. (Aurion)

Kind of surprising that there is only one game from the Dreamcast library on it. Ikaruga and Virtua Fighter have been mentioned, but nobody gave reasons for an inclusion yet. You want to make suggestions for games that belong on the video game Canon? Then head over to the Forums and make your suggestions!