Let me begin by saying thank you to the devs, I really haven't had this much fun with a game in a good long while! It's got the right blend of fast-paced action and tactics, and the style has a particular charm to it. I bought the two pack to play with a GOG friend and we both enjoy it. :)

Onto the topic, the co-op game has lately been crashing when my co-op buddy and I play together. In the past few weeks we completed most of the chapters without incident, but it just started happening in the last few days, several times in a row, either both of us would be dropped 'Other player left the game' or the program itself would completely crash. It has only happened in co-op, usually just at the moment we stun or kill an enemy. I'm playing on Windows 10, NVIDIA GTX 1060, I don't know what other information or files I can provide that can help, just let me know.

And one other minor issue, it appears that the Warrant Server achievement is bugged, no one seems to be able to unlock it, so it's at 0.0% attained, and I've arrested more than five VIPs for sure.

I confirm, played online 3 days ago and during 2 hours of playthrough the game crashed 4 times, sometimes on buddy's computer, sometimes on mine. I sent crash report when the game crashed a week ago, should I email last crashes as well?

I also confirm VIP arrests achievement bug :-)

will investigate more, thanks!

Thanks for the feedback! We'll fix the Warrant Server soon.
Regarding the disconnect in coop, does it happen immediately after starting a level or only sometimes during the level?
Could you please send the error.log file to actionsquad(-at-)inthekillhouse.com after it disconnects?
You can find that file in c:\Users\[YOUR USER]\AppData\Local\KillHouseGames\ActionSquad\

Logs sent, thanks for fixing bugs :-) Crashes happened during the playthrough, not immediately after starting a level.

BTW, you might ask GOG to give your username a 'developer' forum badge, like here :-)

Thank you for the fast fix! :-) Will try it out asap :)