Amnesia: Psychic Spelunker is an upcoming adventure game for the Sega Dreamcast that is being designed by Dan Loosen of The GOAT Store. It is being coded by Paul Willarson, who is well known for the DreamScript coding language as well as for the ports of the emulators SNES9x (the Dreamcast port of which is known as Super Famicast), and the continuation of NesterDC (NesterDC SE).
It was announced in 2006. However, although it hasn't been officially cancelled, it is considered on hold as no new information has been released since its announcement.
The game will be open ended with multiple paths and at least 32 different endings (and only one "real" ending). The player will be able to get something and try using it just about anywhere, and then be able to use it there with different results. Because adventure games ultimately do need a goal, and using a ton of different things in tons of different ways has the potential to make the game overly frustrating, the VMU will play a crucial part in the adventure by hinting to you about things as you go. This is intended to give the game replayability, a trait which adventure games traditionally lack.