Now however it's all systems goes as the first games to use it are getting their final polish before submission to Apple, currently due 21st January.
The launch title for Crystal will be the anticipated twin-stick shooter Guerrilla Bob from Angry Mob Games.
It will also be included in updates to the Chillingo published Mission: Deep Sea and Zombie Dash, amongst others.
As you can see from the screens below, Crystal offers everything you'd expect in terms of achievements, challenges, leaderboards and gamer profiles, all nicely skinned in a game-appropriate manner.
To find out more about Crystal, which will be available for all developers to use, check out the Crystal website.
