We see the name of Clive's superior shown on his name plate as C. Abe (Hiro Kanagawa). In the credits however, he's listed as "Lieutenant Suzuki."
During the flashbacks to the boat party, a zombie Blaine is seen grabbing Liv by the inside of her left arm to scratch her. But when she wakes up on the beach and gets out of the body bag, the scratches are the outside of her arm, just below the elbow.
Major and his date are both using game controllers for what is clearly a single-player game.