Need help with Cobalt-Calibur-3?
Click the “chat” button below for chat support from the developer who created it, or find similar developers for support.

About the developer

470 Stars 74 Forks BSD 2-Clause "Simplified" License 285 Commits 15 Opened issues


DEFUNCT: HTML5 and Node.js multiplayer browser game from 2013

Services available


Need anything else?

Contributors list

No Data

Cobalt Calibur 3.x

Cobalt Calibur 3.x Screenshot

Cobalt Calibur 3 is a rather old (2012) browser-based sandbox game. The backend is written in Node.js (originally Node.js v0.8!). Data is pushed using WebSockets. The frontend uses the HTML5 Canvas tag to handle drawing of the map, and the map is sized when the page loads to fit the size of the users screen. It also uses some HTML5 audio for sound effects.

Example Server:

How To Play

Movement is done with the WASD and arrow keys. Pressing 1-6 will attempt to build the specified tile. Pressing F will attempt to harvest / mine / chop / collect the tile in front of the player. As you harvest materials, your inventory in the upper right will increase. As you place tiles, the inventory will decrease. Unlike other building games (e.g. Minecraft), you don't keep the items you created in inventory, just the raw materials.

Synthetic Tiles:

  1. Wooden Wall (4 wood)
  2. Wooden Floor (2 wood)
  3. Stone Wall (4 stone)
  4. Stone Floor (2 stone)
  5. Wooden Door (12 wood)
  6. Glass Window (4 sand)

Placing synthetic tiles will cause the corruption to slowly be pushed away. Doors will block enemies but will not block players.

Naturally Occurring Tiles

  • Trees: Mine to receive 2 wood, becomes stump
  • Stump: Mine to receive 1 wood, becomes grass
  • Grass: Walk on it. Randomly becomes tree
  • Dirt: Walk on it. Randomly becomes grass
  • Big Ore: Mine to receive 2 ore, becomes small ore
  • Small Ore: Mine to receive 1 ore, becomes rubble
  • Big Stone: Mine to receive 2 stone, becomes small stone
  • Small Stone: Mine to receive 1 stone, becomes rubble
  • Rubble: Mine to receive 1 stone, becomes dirt
  • Water: Makes sand from adjacent ground

Every morning, grass can grow a tree, dirt can grow grass. Dirt and grass adjacent to water will become sand. When there is an earthquake (every few days), it will deposit more stone and ore into the world (and possibly damage buildings).

When the server starts, NPCs can spawn on naturally occurring tiles. They then walk around, (currently) never dying.

Game Mechanics

Walking in the corruption has a chance of hurting the player. Standing adjacent to an enemy will hurt the player. Enemies have very simple AI, they move towards the player. There are day and night cycles, but they don't affect gameplay much. There are occasional earthquakes, and they change the landscape. Health slowly gets restored.


$ npm install

Running Game Server

You'll want to specify the port number as the first argument to the script:

$ ./server.js 8000

You can also run it using Docker:

$ docker build -t cobalt-calibur .
$ docker run -p 8000:8000 -d cobalt-calibur

We use cookies. If you continue to browse the site, you agree to the use of cookies. For more information on our use of cookies please see our Privacy Policy.