I'm about 3/4 of the way through I Am Alive. It is incredibly linear (to the point of the game turning your charecter around if you're heading off in the 'wrong' direction). It has a lot of climbing which is limited by a stamina bar. This is pretty frustrating tbh. You get a gun pretty early on, but hardly any bullets and there's a lot of bluffing with an empty gun whilst trying to manoeuvre enemies over sheer drops/into fires etc. It's a brilliant idea, but let down a bit by its execution. I'm about 10 hours into it, but I've tried to explore everywhere. Is it worth £4.41? I thought so, but I'd have been a bit ****ed off if I'd paid, say a tenner.