HTML 5 games are online games that runs completely inside a web browser. Which means, the games don't use any plugins to run in your web browser as it is fully developed using HTML 5 and JavaScript.
Some of the HTML 5 games listed below are multiplayer games that can be played by a massive number of players. All the games listed below are free to play. Do check them out.
Browser Quest
BrowserQuest is a role playing multi-player game (MMORPG) developed by Mozilla, that can be played by thousands of users at a time. In Browser Quest, you play a character in the game and your job is to complete 20 quests. Each quest involves taking an action such as "Kill 10 rats", "Successfully escape an enemy" and so on.
On the technical side, the BrowserQuest game makes use of WebSockets, HTML 5 Canvas, Web Workers, localStorage, CSS Media queries, and HTML 5 audio.
The game can be played in any modern web browser including Firefox, Chrome, IE, Opera, and Safari. And in multiple operating systems like Windows, BSD, Linux, Mac OS X, IOS, and Android.
The game allows players to chat with each other through text messages while playing.
Bombermine
Bombermine is a fabulous multiplayer game developed using HTML5 and Javascript that allows up to 1000 players to join the game at any time.
As a player, your goal in Bombermine is to strategically place bombs so as to kill all your enemies and destroy obstacles. Exploding bombs can set off other bombs, kill or injure enemies and destroy obstacles. However, they can also kill or injure the player character ending the game, or destroy powerups. It is a fun game that you can play to kill time.
FreeCiv-web
FreeCiv-web is a clone of the popular game FreeCiv. This is a Free and Open Source empire-building strategy game inspired by the history of human civilization. The game commences in prehistory and your mission is to lead your tribe from the Stone Age to the Space Age...
FreeCiv-web can be played online using a desktop computer, mobile phone or tablet. It has also been optimized for the iPhone 5 on mobile, and modern HTML5 browsers such as Chrome and Firefox.
Minefield
Minefield is a clone of the popular and ubiquitous Windows game Minesweeper. Those who have played Minesweeper in Windows need no introduction to this game.
For the freshers, the rules of the game are simple. You have to clear the mines off the field. You play on the endless field with other people. If you set a flag on a wrong place or open a mine - your game is over.
This game is developed using HTML5 and the Javascript library Node.js.