Had a look? Good.
Now you're up to speed, I'll crack on. Whilst perusing the net, which is something I've gotten quite good at in recent decades, I found another interesting little site that sort of does the same as X-Cult - reveals details of cancelled games for a multitude of formats...including our beloved Dreamcast. Before you groan, listen up: Unseen64 features previously...er...unseen pictures and screens of a few forgotten gems that would have been a credit to the DC had they been released, and even grabs of a few games I've never actually heard of...
Shrapnel: Urban Warfare 2025
Spiral Nightmare Type X
Ecco 2: Sentinels of the Universe