The creative director for Far Cry 4 explained how the game will let those who don't own the game participate for free in co-operative multiplayer with a friend who does.

Originally discussed at E3, Far Cry 4 will give buyers of the game 10 codes to give to friends. That downloads enough of the game to play online in Far Cry 4's open world with the friend (but not in campaign missions).

Asked how long the code would last, Alex Hutchinson didn't give the Comic-Con 2014 panel a specific timespan, but it will depend on the friend who owns the game being online.

"The inspiration came from the Super Nintendo days, and the way you tried out games then was to go to a buddy's house and sit on his couch and play," Hutchinson said. "How long you got to play depended on how long his mom let you sit there and keep playing, and when she said go home, that was it.

"So now, when you (the buyer) have decided you've had enough, (your friends) either have to buy it or log off," Hutchinson said.

Friends who join the session will play as Hurk, who flies a gyrocopter and provides air support. "Basically, the guy who comes in to help you is a friend who has agreed to just blow shit up," Hutchinson said. "Who in our universe is the guy who would put his life at risk to blow shit up? It's Hurk."

Far Cry 4 is scheduled to launch Nov. 18 for PlayStation 3, PlayStation 4, Windows PC, Xbox 360 and Xbox One. For more on the game, see Polygon's E3 2014 preview.