Tomb Raider
looks fun 'n all, but I wonder why they had her moan so much.
Anyway,
C&C Tiberian Sun has been officially free for 2 years, and I didn't know until now. Yay, more nostalgia. Yes it's as camp and cheesy as games got back in the late 90s, but I still love the atmosphere. Fun little RTS even if the gameplay could've done with a lot of streamlining.
E: Runs seemingly okay in Win 7 by changing compatibility to Windows 98. You can change the resolution values in the "sun.ini" file to play in higher than 800x600.