Y'know, I don't believe I've officially plugged this yet, so... here goes.
A Path Beyond.
Free, Legal, Stand-Alone mod for
Command and Conquer: Renegade by Bluehell Productions.
Basically, it's a first person shooter that uses
CnC: Red Alert units, vehicles, and buildings. System requirements are low enough that you don't need an awesome computer to play, but it also scales pretty nicely for those of us who do.
For those of you who have concerns about the playability of the game, fret not. It's
very well made overall. Only major complaint is that server size is limited to 26 players at a time, which can make it a little difficult to get in at certain times of day. (though, perhaps, they might be convinced to expand the size)
Screenshots can be found
here.