Whats the best way to integrate online achievements?

What is the best way to go about creating unlock-able online achievements? The game is incomplete and most of the services (googleplay, gamejolt, kongregrate) require you to upload your game to their websites/app stores . Like I said the game isn't complete yet so I'm not really sure how that would work.

What are other ways I could integrate online unlockable achievements?

Edit: A little more info. The end product will be an HTML5 game that will most likely be hosted on our own website/domain. The services mentioned above (GP, GJ& KONG) would require us to upload it to their website to take advantage of achievements. Are there any methods available which would allow us to to do achievements using our own hosting service (hostgator)

Currently have the same problem good luck!

Currently have the same problem good luck!

Thanks. Same to you hopefully we can get some answers.

What about this: ?

What about this: ?

Thanks for the reply.

Unfortunately you have to be invited by a friend to sign up as a developer to use clayio. They don't have open signups any longer.