You can correct any links and patches I post here if you want, I just quickly wanted to get this game working again but it kept getting to 25% then game crashes while installing.
I found the latest update posted in 2014 on another website so if there are later updates you can help by posting below. This is just how I got it installed and running but I have to wait for people to join at least 100 ping servers because I'm Australian, barely anyone plays the Oceania/Aussie games still, probably.

Halo Custom Edition on PC is still going, here are the links:
Game - http://hce.halomaps.org/?fid=410 /
Old patch - http://hce.halomaps.org/index.cfm?fid=3945 (Didn't install this) /
Latest patch - https://www.bungie.net/en/Forums/Post/64943622?page=0... (Just installed this for now) /
Halo 1 Product Key - mcxmm-y29c6-dr36c-b6w4t-t9p73 https://steamcommunity.com/.../disc.../0/666826703565723375/ (Infinite uses apparently). Moddb or Fileplanet are also good websites you can download this multiplayer standalone on.

Halo Custom Edition on PC is still going, here are the links:
Game - http://hce.halomaps.org/?fid=410 /
Old patch - http://hce.halomaps.org/index.cfm?fid=3945 (Didn't install this) /
Latest patch - https://www.bungie.net/en/Forums/Post/64943622?page=0... (Just installed this for now) /
Halo 1 Product Key - mcxmm-y29c6-dr36c-b6w4t-t9p73 https://steamcommunity.com/.../disc.../0/666826703565723375/ (Infinite uses apparently). Moddb or Fileplanet are also good websites you can download this multiplayer standalone on.