Make a TPS, but why should it be with parkour? grin
There is no way to make good parkour shooter with 3rd person camera!
About player movement and camera in FPS, I'm sure that making realistic camera movement isn't that really hard (u know that u can use animations for that).
Try to make movement like in Mirror's Edge (of Dark Messiah), I think u'll learn a lot of new stuff and I'm pretty sure u'll succeed! laugh
Make it FPS, and u will not miss it wink

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