Pfffff Origin....
Brink is "free to play" until this Sunday and costs only 6€ with all DLCs! Yay, I bought it! I liked the unique graphics style during the first "free to play" phase a few months ago.
Unless they changed the game since the previous free weekend, I'd say "no"
Homefront is 75% off on Steam today $12.49. Is it worth it?
I enjoyed it, but it is very much in the line of CoD games. If Call of Duty + Red Dawn works for you, then yes.
O.k.Homefront is an under $10 affair if you ask me.