There has been a community modding project involving the incredible Just Cause 2 that has been going on for a number of years, and now finally, it has come to its official launch. Say hello to Just Cause 2 - Multiplayer!!
No more running and gunning with or hiding from an extra 7 players at a time, as thousands, yes thousands of players can be accommodated at the same time (that's what the printwork says anyway!). So prepare for one of the most chaotic gaming experiences you are ever likely to take part in as chances are that staying alive will be the ultimate goal in this playground of madness.
Just Cause 2 Multiplayer
Just Cause 2 - Multiplayer wiki
See Ivory Tower... 8 isn't the limit ;)!
Note: You need the Just Cause 2 game in order to use this, luckily it can be found on Steam and other places for about $5.