I don't know about cheating the game itself... but "accidentally" disconnecting your opponents controller was always good in the pre wireless days!
Or, as a young child I was insidiously cheated by my older sister in Atari Bowling. Taking advantage of my ignorance of the scoring system, she showed me how my score added up faster if I didn't get strikes, so I'd always try to miss the last pin. No wonder I could never beat her...