Tennis: Your Mii will follow your mouse and hit the tennis ball upon contact. First team to 5 points wins Baseball: Press space to hit the baseballs. You can only miss 3 times before the game is over. Bowling: Your Mii will follow your mouse click to throw the bowling ball. This will repeat 3 times Boxing: Press space to punch.
Credit to Nintendo for the original game and uberduck.ai for the Wii Sports Announcer voice.
