When public relations companies send games to reviewers, they seldom send just the game. Usually it's the game, plus some colorful tissue paper, a snow globe, a mouse pad, or something like that. That's known as "swag," which is used by marketing departments and public relations firms to help build up hype about products.
Sometimes said marketers/PR reps make strange choices.
We recently got sent Wario: Master of Disguise for the Nintendo DS. It's the usual story of Wario stealing treasures and whatnot, this time using a magic wand (read: DS stylus) that can give him different costumes. To go with the game's theme of Wario wearing masks, the game came with two important pieces of swag: a mask and a fake mustache.
I haven't actually tried the game yet. But if it's half as fun as the mustache that came with it, then it's one of the greatest games ever.