At the moment we develop a "Green Coop" modification. It's gonna be a separate mod (not an addon), where you can play HL coop and some other extra maps and compaigns. [ Moddb.com ]
Meanwhile we are working on the co-op mode for Ghost_22's modifiction BioHazard Virus [ Moddb.com ] . This modification will include the coop mode. By the way, We're gonna to map an extra coop compaign for biohazard virus.
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