Box copies or via DLC, if need be.
(Also to show off some of the best arcade games of the last, crisis-ridden years)
A coulpe of examples:
[youtube]http://www.youtube.com/watch?v=r0Lq6SGuSl8[/youtube]
Final boss fight on Planet Harriers, the sequel to the legendary Space Harrier that was being adapted for the Dreamcast. Among it's many shapes, the boss takes the form of the Sega Saturn and Dreamcast's logos.
[youtube]http://www.youtube.com/watch?v=ZIiEiApW7_I[/youtube]
The whole fourth level of The House of the Dead 4, a good entry in the series, in my opinion far surprassing THOFD 3.