The Dreamcast had numerous classic games...but Sega mucked up the advetising badly. In adverts for a game system we lots o shots of the games themselves...
The likes of Shenmue, Virtua Tennis, Crazy Taxi, Jet Set Radio, and MSR are all superb titles which have been out ages for the Dreamcast which match anything the PS2 has yet to produce. Its (superior) version of Resident Evil Code Veronica was also out ages before the PS2 version...