DieselCapcom had a marketing tie-in with the Diesel clothing company and as a result the game contains unlockable Diesel-designed clothing for both Dante and Lucia. Also, the game was promoted in Diesel's boutiques in Japan.
OuroborosThe word "Ouroboros" is written on the side of Arius' helicopter. Ouroboros is the symbolization of concepts such as completion, perfection and totality, the endless round of existence, etc.
Information also contributed by ALAKA