Ice Cube Tray Relays are a great way of getting drunk outside with friends, as it inspires friendly competition that centers around drinking alcohol.
Volleybeer combines Beer Pong and Volleyball and turns it into an outdoor drinking game that can be enjoyed by groups of 4 or 6 people split into teams
Spikeball is a 2 vs 2 outdoor drinking game that requires hand eye coordination in order to spike a ball off a small trampoline or field balls hit the opponent.
The Polish Horseshoes Drinking Game is great to play outdoors on the beach with friends that combines frisbee and beer into a competitive, fun game.
The Corn Hole drinking game is played outdoors and is a staple in America at tailgates and parties alike as it's a semi-competitive way of getting drunk with a partner.