About Slope100
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What Slope100 is
Slope100 is a website for playing Slope, the 3D game where you steer a rolling ball down a green track, in a web browser. It's free, there is nothing to install and you don't need an account.
- The home page and Slope Unblocked run the same version of Slope, with the Slope100 leaderboard beside the game.
- Slope Y8 runs Y8's own Slope player.
- Slope High Score lists the 100 best players on this site and the checked records on speedrun.com.
A game frame stays empty until you press Play. The version on the home page downloads about 18 MB the first time, and your browser can keep a copy for later visits.
Who runs Slope100
Slope100 is part of PLAY100, a small web game studio from Vietnam run by its founder, Mr. Vo. PLAY100 was founded in December 2025 and gives each of its games a website of its own. You can read how it started on the PLAY100 about page.
What we made
We built the website around the game: the green-on-black page design, the Play screen with its drawing of the track, the Fullscreen button, the leaderboard and the server behind it, the Slope100 logo and icons, and the text on every page.
The guides come from playing the version on this site. For the home page we timed 38 test runs on November 13, 2026 and wrote down what each key did. The screenshots on the guide pages are our own captures of the game.
The leaderboard works without changing the game. When a run ends, the game reports its score, this site keeps your best one in your browser, and the page sends it to our server when you beat your own record.
Headings use the Doto font and buttons use Jersey 15, both under the SIL Open Font License 1.1 and loaded from this site. The country flags on the leaderboard come from flag-icons, under the MIT License.
Where the game comes from
We did not make Slope, and we have no license for either version on this site.
The home page and Slope Unblocked run an unofficial web build of Slope whose menu reads V1.0. Neither Rob Kay nor Y8 made this build. We host its files on slope100.com and changed a small part of its code so that it runs here. The build also tries to reach its maker's online services for sign-in, leaderboards and analytics; our page answers those calls inside your browser, so nothing is sent to them. We haven't touched the track, the ball, the sounds or the scoring.
The Slope Y8 page loads the embed player that Y8 publishes on its own Slope page. Y8 hosts that game and its files, and we don't change any of it.
Rights holders who want a game taken down can follow the steps on the DMCA page.
The original game
Rob Kay made Slope and released it on Kongregate in September 2014 under the name robkaySF. Y8 added it on September 30, 2014. The Credits screen in Y8's version reads "game by @RobKaySF", "music by @SynthR" and "published by @Y8.com". On his website, Rob Kay says Slope has passed 150 million plays.
Slope100 is an unofficial fan site and is not affiliated with or endorsed by Rob Kay or Y8.
Contact
Write to contact@play100.io. The contact page says what to include when the game won't load.