New, free mod tools for Halo: Combat Evolved on PC have been released as part of Halo: The Master Chief Collection Season 7. Players don't need Master Chief Collection to install the tools, which can be downloaded by anyone.

The tools come with a number of different programs players can use to modify nearly every aspect of Halo: Combat Evolved, some of which will be familiar to the game's existing modding community. A level editor, tag editor, and a new program, called Standalone, which is essentially a development build of the game, are all included with the toolset.

343 Industries warns users that the tools are being provided as-is, and while there will likely be some updates to the tools to address issues in the future, users should not expect ongoing support.