Roll King

Mission briefing

You steer a sticky ball through colorful voxel worlds — city streets, picnic spreads, deserts, pastry kitchens, and outer space. Roll into toys, food, furniture, and whatever else is smaller than you; everything you touch sticks and makes you bigger. Hit your size goals, chase stars, and keep rolling through 50 stages (then endless mode). Use power-ups like magnets, freezes, and size boosts when you need a push — and don’t let the timer catch you.

Field manual

How to play Drag / swipe (or use the stick) to roll your ball. Bump into objects smaller than you — they stick and you grow. Reach the level goal before time runs out. Bigger ball = bigger things you can pick up. Use power-ups when you’re stuck, and watch a quick ad to continue if the clock hits zero.

Launch orders: press Launch mission above and the game loads on this page itself — nothing downloads and no form stands between you and the first move. It is designed for a flexible screen and takes its orders from mouse, keyboard or touch, depending on the mission. It adapts to both upright and wide screens, so phones, tablets and desktops all frame it sensibly. If it offers a fullscreen control, use it — a fight this size deserves the whole screen.

Field notes for .io arena operations

• Eat at the edges. The centre of an .io arena is where the giants feed; the rim is where small players grow fat on leftovers nobody bothers to chase.
• Never chase a smaller player in a straight line for long. Every second of pursuit is a second the whole arena can see, and something bigger is always watching the chase instead of the chased.
• Use your size as a rumour, not a shield. The moment you make the leaderboard, you become content for everyone's evening — spend big size on safety, position and patience.

Roll King — questions from the ranks

What does it cost to play Roll King?

Nothing at all. The mission is free from the first order to the last — no sign-up, no download, no paid tier guarding the good levels. The advertising around this page is what keeps the board free.

What sort of mission is Roll King?

Roll King is filed in our .io Arena theatre. Like every operation on this board, it is a browser game — read the briefing above for the publisher's own account of what you are deploying into.

Can I run Roll King on a phone or tablet?

Yes. It plays in the browser on phones and tablets exactly as it does on a computer. It adapts to both upright and wide screens, so phones, tablets and desktops all frame it sensibly.

Do I have to install anything before playing?

No installation of any kind. Roll King is an HTML5 game: press the launch button and it loads on this page, and closing the tab leaves nothing behind.

After-action

Mission complete, or still pinned down? The full .io Arena theatre is one click away — The open arena: 45 .io operations where everyone starts small, the leaderboard is public, and growing bigger only makes you a more interesting target.