2 player co-op on 2 PC's
thru a router, believe it or not lol, no setup required , well apart from the network ID changes in the test menu 2PC's & 2copies of the game, plugged into the same router and she is good to go, change rounds etc in test menu.
In the games test menu(T)go to (Network), 1st PC ID1 let it do the test and the second PC same and change to ID2 let it do the test right runs thru your router.
save and restart connection on both and you should see 2 players can compete top