Developer FAQ

HTML5 games that run in a web browser with no plug-in or install. That covers web exports from engines such as Unity (WebGL), Godot, GameMaker, Construct, Phaser, PlayCanvas and Defold, and games built with no engine. See the technical requirements.

Yes. Our licence isn't exclusive, so you can publish your game anywhere else as well. See the Developer Terms.

Yes. You keep ownership of your game. You give us permission to host, show and promote it for as long as it's on KoolGames. The Developer Terms are the official version.

Yes, and you should. Testing your game shows how to run it locally, inside a frame with the same permissions as our player, and on different devices. The demo game page shows how your game page will look.

[Which countries you accept submissions from]

We play every game. We check that it loads and works, that it meets the gameplay requirements and technical requirements, and that it follows our Community and Content Guidelines.

Yes, if your game supports them. You choose desktop, tablet and mobile on the submission form. KoolGames works in the browser on all of them, so make sure your game's controls and layout do too.

After you submit, your game's status is Pending. When we start testing, it changes to In review. We check that the game loads, can be played from start to finish, and meets our requirements. See Launching on KoolGames.

Your game goes live on its own page, in its category and in search, without ads and outside the home page. Plays and likes start counting. This shows us how the game runs with real players.

We move a game to Full launch when [what a game needs to reach Full launch]. The ad spaces on its page switch on, it can appear in the home page rows, and players hear about it through their notifications.

Review usually takes [typical review time], and Basic launch usually lasts [typical length of Basic launch]. You can follow every step on your dashboard.

So we can check that your game works well for real players before ads go on. It also means any early problems don't affect advertisers or your game's first impression.

No. We need a build that you control, not a link to a copy on another portal. Send us an embed URL on your own hosting, or upload the build itself.

Yes. Your link must use https://, load without a login, and allow your game to be shown in a frame. See Technical requirements.

There's no fixed size, because your game should scale to fit its frame. The default in our player is 960×540, and we set the size during review. Read about gameplay requirements

Yes. Choose landscape, portrait or both on the submission form. Our player keeps your game's shape and fits it to the screen.

We advise against it, because many players are young. If your game has chat, you are responsible for moderating it, and it must follow our Community and Content Guidelines. Tell us about it when you submit, so we can review it properly.

No, you don't need to.

Its status changes on your dashboard, and a message appears under Updates. You'll also see it on the notifications bell on the main site when you're logged in.

Yes. Fix the problem and submit it again from your dashboard. If you're not sure why it was rejected, ask Support.

Yes. Your dashboard shows total plays and likes for each live game. See Analytics and player feedback for how plays are counted.

Players send feedback to us, with the flag icon under your game or through the Contact panel. There's no feedback page on the dashboard yet, so we pass on what's useful.

Yes. Press Update under your game on your dashboard. We review it, and your current version stays up until it's approved. See Updating your game.

Most Popular uses total plays, Hot Games uses plays in the last 24 hours, and Highest Rated uses the share of likes. Can't Stop Playing uses repeat plays and average play time. Top Picks For You is worked out for each player. See Analytics and player feedback.

Only games at Full launch can appear there. New games appear in the New Games row. Other rows depend on how players respond, and Featured Games are chosen by us. We can't promise a place.

You can, through a share of ad revenue once your game reaches Full launch. We can't promise any amount. See Monetisation and payments.

No. Your game mustn't show its own ads unless we have agreed that in writing. Ask Support first.

You'll receive: [Revenue share, for example 50% of net advertising revenue earned on your game's page]. What that adds up to depends on how many people play, where they are, whether they accept advertising cookies and what advertisers pay. We can't give an estimate.

We pay [payment schedule], by [payment methods], once you've earned at least [minimum payout]. See the Developer Terms.

[Whether KoolGames provides a CDN, and how zip builds are hosted]

Yes, as long as every file loads over https:// using relative paths, or from your own server if you host the game. Test it with the steps in Testing your game. Remember that a zip can be up to 50MB in total.

The current versions of Chrome, Firefox, Safari and Edge, on the devices you choose on the submission form.

No. You run your own servers, using secure connections.

A non-exclusive licence to host, cache, show and promote your game while it's on KoolGames. You keep every other right. The full wording is in the Developer Terms.

Sexual content, graphic violence, hate, real-money gambling, malware, and anything that tricks players or uses other people's work without permission. See the Community and Content Guidelines and the Developer Terms.

It's based on the ad revenue we actually receive for your game's page, less refunds and invalid traffic. The Developer Terms are the official version.

Ask us at any time and we'll take it down within the time set out in the Developer Terms. Revenue earned up to the day of removal is still payable.

Yes, if it breaks the rules, stops working, or is the subject of a valid legal complaint. See the Developer Terms and our Copyright and Takedown Policy.

KoolGames is a new platform, so we have no earnings to point to, and we won't promise any. What you earn will depend on your game and on how many people play it.

We don't publish rankings of other sites, and traffic changes all the time. Independent web traffic tools are the best place to compare them.

It varies widely with the audience, the country and the ad platform, so we can't give a reliable figure. One of the attractions of publishing on a portal is that the portal brings the players, so you don't have to pay to reach them.

It depends on the game and the market, so there's no single answer. Web games do have one advantage: a player can start with one click, with no store visit or install in the way.

No. KoolGames has no in-game purchase system, and your game mustn't take payments unless we have agreed that in writing.

It can be, but there's no guarantee. Like any platform, it depends on your game, your costs and how many people play. Web games are often cheaper to ship and update than native apps, which helps.

KoolGames is a free games site for teenagers and adults. [Audience size, once you have real figures]

We focus on speed and honesty. Games start straight away with nothing to install, the site is built to be quick on phones and laptops, and a play only counts after 30 seconds of real game time, so your numbers are real.

That's your call. KoolGames is new, so we can't show you a track record yet. Publishing isn't exclusive and costs nothing, so you can try it alongside anywhere else your game is live.

We don't publish market figures. What we can say is that browsers keep getting more capable, with technology such as WebGL, WebGPU and WebAssembly, so more kinds of games can run on the web.

Players can start with one click. One build can reach desktop, tablet and mobile. You don't need app store approval, and you can publish fixes right away if you host the game yourself.

Anywhere that suits your game and allows it. Our licence isn't exclusive, so you can publish on KoolGames and elsewhere at the same time.

A page for your game, a place in its category and in search, review before launch, honest play counts on your dashboard, and a share of ad revenue from Full launch. If you send a zip, we host it for you.

Yes. We care about the game, not the size of the team.

Not always. Some engines let you build games with visual tools and little or no code, and many can export to the web. Learning some code will give you more freedom.

Go to the Developer Portal, create an account and submit your game from your dashboard. Launching on KoolGames walks through each step.

[Whether KoolGames has an SDK, and whether integration is required]