There could be a Friend system.

Nov 9, 2020
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Ckyle108
#21
also would you like to leave the game and download the map just to come back and have it possibly be gone
 
Nov 12, 2019
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dB REPO 3696
#22
The maps download from the repository while you’re in the lobby. Everything that’s doable that you’ve asked for has been done.
 
Nov 9, 2020
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Ckyle108
#24
Maybe firefight advanced, where you get marine or ODST support you can call in while the covenant overwhelm you.
 
Nov 9, 2020
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Ckyle108
#26

This is the closest thing to firefight on h2 you're gonna get rn.
I know but I think the mod itself is good, but the problem here is that they kind of spawn kill and it gets annoying, hell enemy's stop spawning at one point, I do have it though, but it doesn't have customizable difficulty, its good by itself though.