Many people are having trouble configuring Objective Gametypes in Reach with errors like "Your map is not compatible with this gametype" or other errors. This has been spliced from GodlyPerfection (previously AZN FTW) Forge Lessons on the topic. He has explained it using Territories as an example, so just replace that with whatever gametype you have been using. Ignore any reference to Conquest as that was what he was building at the time.