FABLE it has not got the Nintendo size sales or the Mass Effect type reviews. All the FABLE games on metacritic are in the 80's so they are not universally loved or nothing. Though they do really innovate I don't think they have been able to successfully make the game mechanics into a cohesive single unit although in FABLE III I believe they came quite dame close. The games usually feel like I am playing two games. There is the Action adventure RPG and then there is the SIMS GTA in OLD UK feel type game. Both are very fun they just dont mesh completely together yet.
If they really do implement milo game mechanics into the next FABLE and improve the cohesiveness of the other mechanics, and polish it as much as a GT game I think it could be the Best non Pokemon rpg since FFVII.
