Alternatives

Products that do what CSS Arena - CSS Challenges & Battles does

Free multiplayer CSS battles — real-time, up to 4 players

1CC
Cs16.css – CSS library based on Counter Strike 1.6 UI▲819
2025 · cs16.samke.me
2
CSSBattle▲322
Play against others in golf with your CSS skills
2019
3
CSSBattle Custom Battles▲81
Your targets, your battle
2019
4
playCSS▲171
Improve your CSS skills by playing daily challenges
2023
5CS
CSS Speedrun – A small game to test and improve your CSS knowledge▲213
2022 · css-speedrun.netlify.app
6
Agent Arena▲357
The first public arena for AI agents
Jun 2026 · arena42.ai
7IM
I made a browser-based RTS game▲212
I've posted this game here before, hopefully a repost is fine as the game has changed quite a bit (improved AI, improved mapeditor, much quicker gameplay, etc). Game is based on JavaScript/Canvas and WebSockets. On the browser side the map is pre-rendered (as a background image), just the mobile units/buildings and animations are dynamically rendered. The lobby server is made in node.js, but the game server is C++ for performance reasons (mainly the pathfinding). I found the C++ WebSocket libraries out there to be too difficult to use so I made my own based on the rfc. Overall I…
2022 · battle-of-flags.com
8
Browser Arena▲175
Open-source benchmarks for cloud browser infrastructure
Apr 2026 · browserarena.ai
9
CSS Blocks by Linkedin▲102
Blazing fast CSS for your design systems and apps
2018
10
Layer▲175
Making your browser multiplayer
2023
11CS
CSS Studio. Design by hand, code by agent▲175
Hi HN! I've just released CSS Studio, a design tool that lives on your site, runs on your browser, sends updates to your existing AI agent, which edits any codebase. You can actually play around with the latest version directly on the site. Technically, the way this works is you view your site in dev mode and start editing it. In your agent, you can run /studio which then polls (or uses Claude Channels) an MCP server. Changes are streamed as JSON via the MCP, along with some viewport and URL information, and the skill has some instructions on how best to implement them. It contains a…
Apr 2026 · cssstudio.ai
12BG
Balancing game for the mobile browser with increasing difficulty▲338
I made this 10 level Game. Excited for people to try it. :) Stay Balanced :)
2024 · balanc3dgame.com
13AO
An online 2D MMO game, written in Rust and JavaScript▲171
I made a game (https://polyfight.io/) which revolves around a player (a tank) leveling up and upgrading by killing shapes and other tanks (partially inspired by https://diep.io). It has a bunch of features, a vast number of tanks, an inbuilt chatting system, clans to make teams with your friends, a colour scheme maker, controllable sandboxes which can be public or private, a last man standing gamemode, and an inbuilt 1v1 system with its own ELO rankings and a global leaderboard. The game has a few players right now, and I'd hope to spread the joy players have with…
2024 · polyfight.io
14
A Single Div▲177
A CSS drawing project
2016
15FD
Flexbox Defense – learn CSS flexbox by playing a tower defense game▲243
2016 · flexboxdefense.com
16AI
Acolytefight.io – Multiplayer Skillshot Arena HTML5 Game▲66
2018 · acolytefight.io
17
Realtime Multiplayer by Supabase▲273
Easily build real-time apps that enables user collaboration
2022
18
CSS Triggers▲80
A game of layout, paint and composite
2014
19
Layer CSS▲152
Lightweight CSS framework to build your own fluid layouts
2015
20FF
Full Freeciv client running on WebAssembly▲97
2022 · freecivweb.com
21SO
Simple Open Source 3D Online Multiplayer Battle Game Using Node.js▲102
2018 · paiza-battle-ground.paiza-user.cloud
22
StyleWars.dev▲5
CSS battles for pros, interactive learning for others.
Mar 2026 · stylewars.dev
23
Design Battle▲3
Real-time design battles — same brief, vote to win
Jun 2026 · designbattle.hubmonster.io
24
StarCraft HTML5▲126
An HTML5 version of the classic RTS
2015

Ranked by how close each launch is in meaning, then by votes. Refine with a description →