Omikron 2 (Nomad Soul: Exodus, later renamed to Karma)
Van Buren (what was to be Interplay's Fallout 3, though this just might still happen, according to Brian Fargo)

Not exactly cancelled, but I would have to say Dinosaur Planet (the original version, not the one rebranded as "Starfox Adventures")

Same thing for Conker's Twelves Tales (remade as "Conker's Bad Fur Day", which is one of the best N64 titles, but it's almost a totally different game, so it would still be nice to see a prototype released someday!)

But anyway..

For me its got to be Timeplitters 4. Some of the best local multiplayer games I've had was with TS series.

Its a huge shame we're not likely to ever see a new TS iteration (curse you Crytek).

I wish EA would have continued making Command and Conquer Generals 2 instead of changing the concept for money and then finally kill it completely.

Banjo Threeie, Mega Man Legends 3, Metroid Dread, TimeSplitters 4 and Eternal Darkness 2 to name a few.

Silent Hill from Hideo Kojima , damn you Konami

I wish we got the look of the Zelda Tech Demo from 2011 instead of the Zelda Wii U that we will have, if I'm being honest.

Final Fantasy Versus XIII in its original concept. I loved the look of the world and how they described it. Here's hoping XV has retained some of the elements I liked from the original concept.

Chrono Break, if it ever even left the pre-conceptual stage.

zombiu 2

that Dinosaur game for the Xbox

EarthBound64