Games that would be sweet if they existed

[Angrist]

I'm still waiting for a snowboard game where you're dropped on the top of a mountain and you have to find your own way down. Basically a sandbox snowboarding game.

Also: a Jurassic Park survival game where you can survive in like 25 different ways. You're in the middle of the park, your car broke down and you have to escape the island. You could either concentrate on guns (find the gun shed and blow those critters to shreds), exploration, hiding, building (a raft to get off the island?), ecology (behaving in such a way that dinos won't attack), etc.
Very moody graphics/weather/music. Co-op possible.