Some of the things that bother me while I play the way Duo. I fully understand that not everyone is a professional, but do not let the combo timer run out! It's really easy to keep it going when you are playing two. If I have no enemy near me, then most likely you do in your place. When I have a good partner, the combo timer can run for years, but I sometimes wonder what my partner is doing. There can be periods of up to half a minute before you see any kills recorded by my partner.
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