Submission Checklist

Before you submit your game to us for approval, here is an integration checklist that should be completed. After you make sure that your game meets all of these criteria, feel free to contact us and request that we run a quality assurance pass on it to make sure it’s ready to go for publishing. This is the same checklist that we use when verifying your game, so if your game doesn't pass an item, we will ask you again to make sure it does before we can approve it for publishing.



Please make sure before submitting your game for approval that it is uploaded to the account that you wish to publish the game under.

Kreds Purchases

  • Players can make a purchase in the game.
    The purchased item should show up quickly following the completion of a purchase.

  • Purchase prices match between the UI and the server prices.

  • The game checks for uncredited purchases on start-up.
    Basically, each time the game loads, you should call the same function that you use after a purchase is made to check for items in the user’s Kongregate inventory. This helps reduce problems from network errors and allows the user to refresh the page if a purchase fails, cutting down on support emails.

    The best way to check for this is to start a purchase, open up the first Kongregate purchase window, confirm the purchase, but then don't close or continue on from the confirmation purchase window. Instead, refresh the page - this will cause the game to not notify your local callback function of the completed purchase, even though the item was paid for (thus simulating a network/computer glitch). The item should still be credited to the player upon loading the game again.

    Note: If you are using the dynamic item purchasing API this will not apply to your game.


  • The game correctly identifies a user.
    If the user logs out and logs in as a different user, the game correctly switches over to the new user. (You can contact us to add permission for multiple users to access the test version of your game: just tell us which usernames you wish to have access.)

  • The game protects against hacking by manipulation of the authentication URL.
    This one is a little more complicated, but basically we want to make sure that you’re protecting against hack attempts by changing the authentication URL parameters. As long as you’re using the full authentication API and not just reading and trusting the userID passed in via the URL, you should be fine.


  • Initialized stat is being submitted.
    We strongly recommend submitting a stat to us called "initialized" or "loaded" that sends a "1" each time the game loads successfully. This must be done early, generally at the title screen after the game has loaded, or no later than character selection/creation (if that happens first thing) - it cannot be post-tutorial or after the first level. We can use this stat to ensure that ratings for the game are by people who meet the game's minimum system requirements. It generally is not as important for Flash games, but if you use an unusual plugin/technology like Unity3D, Java, or HTML5, or are Windows-only, this will help give you a more accurate rating and is highly recommended.

    Let us know if you have set up a statistic like this so we can set it up as a filter. We also strongly encourage you to use the Statistics Client API to submit this statistic as opposed to the Server API, as it makes testing this statistic a lot easier for both you and us, allowing us to approve your game faster!

    Note: As this may modify the game's rating, any games using this service will be excluded from monthly contests.

  • Other statistics are working and submitting scores.
    This is optional, but implementing statistics such as player level or PvP ranking are a great way for players to compare their progress against one another. Perhaps more importantly, if your game later qualifies for badges we'll need the Statistics API to implement them.

    If you end up adding statistics into your game, make sure they are submitted when or soon after their specific event occurs, and also make sure to resubmit them every time the game loads. That way, if a player has connection issues, the next time they load the game their score will still be updated!

Other points

  • Guest landing page.
    Players that come to the game but aren't signed in to a Kongregate account should see a guest registration page, hopefully with some sort of cool art and explanation of the game that would make them want to register. There should be a “Register” button somewhere on the page that calls The game should listen for login events and automatically log in when one occurs.

    Note: In order to test as a guest, get your guest access URL by adding /api to the end of your game's URL.

  • The game functions in Internet Explorer.
    If it does not, this is usually indicative of not setting P3P headers correctly.

  • The game functions in Safari (optional).
    If it does not, this generally has to do with attempting to set cookies from within a cross-domain iframe. Safari’s security policy is set very high by default, but there are a few workarounds that can let your game function.

    If you cannot support safari, please detect the browser type and display a message suggesting Firefox or Chrome to the player.

  • No outside referral links.
    While we are happy to have friend referrals in the game, they need to be URLs that point back to Kongregate. You can preface URL parameters with kv_ (ex. ?kv_foo=bar) to have them passed in to the iframe.

    When all of this is completed and you've submitted your game, we'll also do a quick play-through to make sure the UI is functioning, there aren’t any dead/incorrect links, or anything else that stands out as non-functional in the game.

Game Assets

  • Game Icon
    One asset is used to generate all game cards—500x400px. The game ‘Icon’ can be the same or different from the cover. Use this template [Download] to test and preview your design for all instances and how they crop. Note: The live version applies a CSS blur effect for tags, but in the template preview, it appears as transparency instead.

  • You also will have an opportunity to submit game screenshots. These are optional but will be visible for when players hover over your game listing.

  • Game and Audience
    Your game cover is your first impression—make it count! Understand what makes your game unique and who your target players are. Explore what's out there, especially in your game genre, and brainstorm creative concepts that align with your game's essence.

  • Bold Design
    Ensure your cover grabs attention with bold visuals while keeping it clean and focused. Match the mood of your cover to your game's atmosphere and themes. Highlight your main characters or standout features prominently. Understand that your cover will also populate instances where your game is listed and linked as small as 20x20px.

  • Clear Typography
    Make sure your game's title is easy to read and stands out if you choose to include it. It’s recommended you center it to ensure it is never cropped.

  • We're here for you!
    Test your cover with others and refine it based on feedback. Ask for help if you get stuck!

  • If you have additional general marketing assets that we could potentially use in future promotion we'd be happy to get those as well. Layered .psd's are often best, but we can work with most anything. Please feel free to send us anything else in a zip or as an ftp link. We're not guaranteeing additional promotion, but if we are able to do some it is helpful to have a cache of assets for the game.