Hitman....

Colorado is a big map with lots of guards, on normal mode it was 'easy' as you could save after each target take down or before a tricky point. Pro mode only amplifies the maps tough points and amplifies it with extra guards with altered guard pathing and more camera's that cover the older weak spots. Along with only one save Pro Colorado is proving to be a massive PITA.
This may take a lot more time to progress through.

I miss the old red shading, this new grey version is annoying, especially when it gets late. It would seem I'm not alone in thinking the red UI was better.