In most FCG gametype options, aside from legacy slayer modes, you can change what players spawn as. You can even make players spawn as random biped. Keep in mind, players will not spawn in if they spawn with a weapon their biped cannot hold. So, for example, the players primary weapon is a plasma pistol. Players would only spawn as grunts, jackals and elites. They will never spawn as brutes because brutes cannot hold plasma pistols. If the gametype is set to only spawn players as brutes then in this scenario they would never spawn in! Just wanted to hopefully stop people from unexpectedly encountering an issue like this.

You are also not limited to playing my FCG modes. If you take a vanilla gametype, CTF for example, and uncheck all required object types with Reach Variant Tool, you will be able to play the gametype on the firefight maps. You will just have to compensate for the lack of a flag stand with a VIP boundary in forge.

If you have any gametype suggestions please comment here about them. I'm already planning on getting headhunter working. Maybe stockpile.