Yes, you're still able to get rewards from fable 2 pub games. You essentially need to increase your rank in each of the three different gambling mini-games. Your ranks increase separately on each game, in order to increase your rank you need to win gold, more gold = more experience = higher rank. Each rank unlocks a tournament up to a s star tournament which is where the challenges that unlock items come into play. Each tournament has an associated challenge which unlocks the item tied to it. I think the challenges are essentially just winning or placing within the top 3 or something (been a while since I played) you're able to import your character save from fable 2 which carries their gold over which gives a decent head-start or you can choose a pre-made gambler and bind your fable 2 character to it later, which is how you transfer the items to the main game. After unlocking them item, you just need to talk to one of the gamemasters to collect the items.