It is a collectible card game. It is a game with simple mechanics, in fact all the cards have 1 to 3 keywords to describe their skills. The game consists of resetting the life points of the opposing characters (Heroes) to earn VPs (Victory Points) with each kill.
Within the game there are different types of cards, permanent and temporary.
The game is all written in HTML, PHP and JavaScript so it can work on any type of browser.

Deliricard

alienmelon

Mackerelmedia Fish is an ARG-like text adventure about digital archeology and friendship in unlikely places.

Mackerelmedia Fish

Trailer

Jo99

Help Krystine to rescue her little brother kept prisonner into the castle of nightmare

Krystine and the children in chains

Bandai Namco Entertainment

The Idolmaster: Shiny Colors or "Shinymas", is a training simulation browser game. The game has a system similar to The Idolmaster console games, with the main gameplay including lessons, auditions, and a story with visual novel elements.

The Idolmaster: Shiny Colors

Miniclip.com

Matheus Valadares

Diep.io is a multiplayer shooting browser game like Agar.io, Wings.io and Slither.io. While playing this game, you have to control a tank to destroy the other players and obstacles.

Diep.io

Game intro

Fancy Island is a Japanese horror puzzle game with the front page being disguised as a cute Nekomimi illustration gallery front. Upon clicking the catgirl in the middle, the game will begin. The objective is to reach the goal gallery in a point-and-click environment while avoiding jumpscares/monsters.

Fancy Island

Cruxata was a web MMOG based on medieval wars during the crusades, a series of intermittent military campaigns sanctioned by various Popes in the Middle Ages. The game was created by an independent game developer know with the nickname "lucky". The game was recently closed due to lack of time to maintain and update.

Cruxata

Gameforge

OGame is a strategy game set in space, with thousands of players from across the world competing at the same time. You only need a regular web browser to play.

You start out with just one undeveloped world and turn that into a mighty empire able to defend your hard earned colonies.

Create an economic and military infrastructure to support your quest for the next greatest technological achievements.

Wage war against other empires as you struggle with other players to gain the materials.
Negotiate with other emperors and create an alliance or trade for much needed resources.

Build an armada to enforce your will throughout the universe.
Hoard your resources behind an impregnable wall of planetary defences.
Whatever you wish to do, OGame can let you do it.

Will you terrorize the area around you? Or will you strike fear into the hearts of those who attack the helpless?

OGame

Dancing☆Onigiri is an open-source Japanese web browser rhythm game that is currently written with Javascript, HTML and CSS, and was formerly made using Flash. This game contains charts of various keymodes such as 5key, 7key, 11key, etc. that are either played static or dynamic, all community made! You can even create your own charts and even keymodes, provided that you know how!

Dancing Onigiri

Gameplay Video

PixelPlush

Parachute Drop is a game where you drop your character and try to land on the center of the target! Set channel points cost to automatically create a drop redemption or type drop or your custom command into your channel chat.

Parachute Drop

Pongis Games

Jump over canyons and rocks at an ever increasing speed.

Pongis Jump

Jacorb

Prestige Tree is an incremental idle game made for browsers by Jacorb, and features multiple layers of progression that compile upon each other in a tree format.

Browser Games on HTML