It's sad that the Halo Online links have been shut down. But I found have kept a direct link to the game! ;D
Download: https://drive.google.com/uc?id=1nsydiZHlHLcFIa-QzKGOvhg1nvyP9Fj3&export=download
Instructions
1. make a folder for the game
2. Download and drop ELDewrito into the folder
3. double click ELDewrito to extract it
4. Make a shortcut for the blue helmet
5: now run the blue helmet and you got the game!
Note: It's been a long time since I installed it and I had to get help from a friend, so I not be 100% correct on how to do so. Please tell me if any of the steps are wrong.
Download: https://drive.google.com/uc?id=1nsydiZHlHLcFIa-QzKGOvhg1nvyP9Fj3&export=download
Instructions
1. make a folder for the game
2. Download and drop ELDewrito into the folder
3. double click ELDewrito to extract it
4. Make a shortcut for the blue helmet
5: now run the blue helmet and you got the game!
Note: It's been a long time since I installed it and I had to get help from a friend, so I not be 100% correct on how to do so. Please tell me if any of the steps are wrong.