Codename Kill Monster is a concept of an online browser gaming engine. This project started with the objective of making an online RPG that could be programmed and edited directly in the browser, so users could make their own improvements. It also had the objective of making it without using browser plugins where possible.

The last milestone of the concept uses:

• Gaming project inspired by Kill Monster (by Chipmunk Scripts)
• PHP-like user scripting
• AJAX/JavaScript
• Yahoo User Interface (YUI)
• GSIV-based script for Users Positioning and Mapping Purposes
• Sound Manager JS/Flash API