Most of the FF games are indeed fairly linear, with the occasional optional sidequest dungeon. Most of them, however, were better at providing the illusion of nonlinearity.
Sadly they're still restricting it to one per order. Last time around I was able to make multiple purchases and get a Live card each time without getting 'locked out', but that's still far from convenient.
But I guess Continuum Shift is coming soon... hm.
It took a bit to activate and send me the e-mail, but I got Metro 2033 and STALKER. Metro 2033 activated fine on Steam but STALKER won't for some reason, sadly.
The GTA collection for $5 with shipping ain't half bad.
And it doesn't look like Crackdown 2 is going to eclipse Crackdown, for better or worse, so it's still a good deal.