When AMD launched its Mantle API, most didn't really have much faith in it, because the chipmaker didn't have that much support outside of DICE. Well, now they do. AMD has acquired the help of three more developers, two of which are actually quite big.
First up, we have Square Enix's Eidos-Montreal studio, who are currently working on putting Mantle support into future titles, such as Thief, which is coming early next year. A not-so-surprising entry is Cloud Imperium Games, who is working on the absolutely incredibly beautiful CryEngine-powered Star Citizen. Chris Roberts, gaming god and CEO of the company has said: "Mantle is vitally important for a game like Star Citizen, which is being designed with the need for massive GPU horsepower."
The third developer you may not have heard of, with Oxine Games stepping on board. The developer is working on a new 64-bit, multi-platform, multi-core gaming engine known as 'Nitrous'. This game engine is in the very early stages of development, so it should have Mantle support built into its core.