The open multiplayer beta for Resistance 3 will begin at some point in the first week of August.
IGN attended a panel at Comic-Con where Insomniac Games confirmed the news.
Two modes, Team Deathmatch and Chain Reaction, will be included in the beta. There is no word on which maps will be included.
Resistance 3, which is exclusive to PS3 and will support 3D and PlayStation Move is due, for release September this year. Pre-Order your copy here.