I plan to implement missions with achievements (or rewards/badges) in my online space browser game spacetrace.
I want somehow connect that to an existing online achievement platform for browser-based HTML5-games?
There are some online platforms that lets users show their achievements in several games they have reached like GameCenter, OpenFeint, Steam, PlaystationNetwork and Scoreloop
But is there a great community for browser-based onlinegames too?
clay.io looks quite promising.
Which is the most used platform that I should implement the achievements on?