Pen Fight operated by LetsCrak

Pen Fight Guides

Last updated: 4 September 2026

Pen Fight is a free browser game of the school-desk pen fight: two pens on a desk, players take turns flicking, and whatever goes over the edge belongs to whoever knocked it off. It runs on a phone or a laptop with nothing to install and no account. These are the pages that explain it.

Start here

• How to play Pen FightDrag back, release, knock theirs off. The controls, the rules, what counts as out, and how one round, best of five and best of seven are scored.
• What is Pen Fight?The desk game itself: where it is played, the rules as they work on real furniture, the house rules, and how pen fight differs from pencil fighting.

Getting better

• Tips and tacticsTen things that win rounds — owning the middle, hitting off-centre for spin, and why full power is almost never the right answer.
• The nine pensWhat each pen does on the desk, plus the measured win rates from 9,400 headless matches and why there is no best pen.

Playing other people

• Play with friends onlineSix-character room codes, up to four at a desk, built-in voice chat that works on iPhone too, and sending a finished round on as a replay link.

The short version of all of it

• The flick. Drag backwards from your own pen and release. Drag length is power; drag direction is aim; where you grab it decides the spin.
• The round. Players alternate flicks. A pen that goes over the edge is out — including your own. Last pen on the desk takes the round.
• The match. One round, best of five or best of seven. Two players race to the target; three or four play the distance and settle it on marks.
• The bench. Eleven bot opponents, easiest first. Three wins against one opens the next.
• The case. Nine pens, all balanced inside a 3.4-point win-rate spread, so the pick is preference rather than power.
• Online. A six-character room code, up to four at a desk, no account and no download.
• Voice. Live voice chat in every room, peer-to-peer, working on phones as well as laptops. The mic is off until you press it.

About the game

Pen Fight is made by LetsCrak. It is built with three.js and the Rapier 3D physics engine compiled to WebAssembly, which means every flick is a real rigid-body simulation rather than an animation: the desk is 70 cm by 45 cm, and each pen's length, mass, surface friction and bounce were measured off actual stationery. The heavy parts load behind the lobby, so the first screen arrives in a few tens of kilobytes.

Questions, problems or business enquiries go to the contact page.