A CSI game that doesn't hold your hand?

[harmor]

I like the CSI games but they are too easy. Is there any games similar but requires thinking and not have your hand held while solving cases?

[Chousho]

You could try the real thing ;D

[Floris]

rofl @ chousho

There aren't that many games anymore that are really hard or interesting.
half life 2 : portals is the only one that blew my mind as far as thinking 2 gaming - goes

[Dominic]

There's a Criminal Intent game too but I don't know how hard this is.