Dreamcast

Plasma Sword: Nightmare of Bilstein60+ Soundtrack Score07/28/05

DS

Bubble Bobble RevolutionSecret Coke can item (Classic Mode)03/05/07
ZuboThe five secret All Star Zubo01/13/09
ZuboWhite Room01/13/09

PlayStation 2

War of the MonstersMaking of...War Of The Monsters-PAL version only12/21/05
War of the MonstersMecha Sweet Tooth-PAL/UK version12/21/05

PlayStation 3

The Club'Unlockable' Characters02/11/08

PSP

Gangs of LondonGang bosses09/05/06
Justice League HeroesChallenge Missions06/12/07
Lumines IIUnlock additional characters12/20/06
Marvel Nemesis: Rise of the ImperfectsUnlockable Characters01/28/06
Power Stone CollectionUnlock the two '???' mini games10/23/06
X-Men Legends II: Rise of Apocalypse'Unlock' X-Man11/18/05