I played the original tomb raider, it's the same game. I know the puzzles and bar some new small features, I knew exactly what to do 90% of the way through, I dont collet artifacts, or relics unless they are vital, because I did all that stuff before. It really isnt that impossible, in the summer I'll make a fraps speed run. My Exact time was 10 hours 46 minutes 32 seconds, played on meddium difficulty. It's no different to completeing Half Life two in 3 hours or something which people have done... you just have to know all the short cuts.