CSSBattle is described as 'online CSS Code Golfing battleground. Here, players from all around the world try to visually replicate "Targets" in smallest possible CSS code and battle it out to get to the top of the leaderboard' and is an website in the Development category. There are more than 10 alternatives to CSSBattle, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Steam. The best alternative is CheckIO, which is both free and Open Source. Other great sites and apps similar to CSSBattle are CodeCombat (Freemium), Screeps (Paid), Robocode (Free, Open Source) and Bug Brain (Free).
The Rabbids invade space, and in true Rabbids-style, turn your spaceship upside down! Using blocks of code, you need to give them instructions to clear up the mess they have created. This free educational game is aimed for players from the age of 7 and upwards.
Selfless Heroes is a puzzle game that will teach you how to program without you noticing. Take control of a team of heroes who share the same artificial intelligence. It's up to you to create their AI so that they cooperate as best they can.
BotWars is a free to play online multiplayer game where users can create a bot/robot within their chosen programming langue – Once created users upload their bots to the website, where they will be automatically entered into an arena to determine an ultimate victor.
CeeBot is a brand new concept with which you will learn programming while having fun. The programming language you'll use is very similar to those used by professional programmers to develop their products.