I've re-funded my rf2 a while ago, yet I got the same mail. So out of curiosity I've tried, and I could activate it on steam. Interesting. Yep, activated, installed, played. I don't know if online works though - I didn't try.
Dont even have it installed anymore, just cant handle the pacman graphics
For millions of years mankind lived just like the animals
Then something happenend which unleashed the power of our imagination, We learned to talk.
RIP Stephen Hawking