Well,
I bought Alan Wake and got God of War Collection (1&2) for PS3 free, I'll count that as one purchase.
Minecraft
Halo: Reach
Alan Wake & GoW Coll. - I've not played them but they cost me a total of about $50.00 so I'm happy with that, even if I only play through both of them once over the course of my life.
Minecraft - Would have payed $50.00 for it, I only payed $14.90.
Halo: Reach - I got the Legendary Edition. It was definately worth it. I'm not a Halo fan per se, but I've played all of them and beaten all but Combat Evolved and Halo Wars. That being said, I liked the look of the Figurine/Model that came with Legendary and after playing the first mission at my brothers I tracked a copy down and bought it the next day. I don't regret it for a second.
The campaign is enjoyable in both co-op and single player, the online multi-player is heaps of fun with friends, I've still got firefight and online co-op campaign left to toy with.
Forge world is not what I was expecting unfortunately, but that doesn't detract from the fact that I am more than satisfied with the game.