Alternative to Infection?

Does anyone know a decent alternative to infection? I’m trying to remake Splatter Monkey, and for those who remember in Reach, the survivors had random weapon loadouts and since it was on Infection, when the survivors all die the next round starts. But for obvious reasons there are no loadouts in H5 and no Infection. I could use some help on deciding what I can do, if not I’ll have to wait until Infection drops to remake it

You know since we have scripting, I think we have to make infection ourselves. lol