Madden NFL 95

Expansion teams:
Start a game and enter the game setup screen. Highlight the "Home" or "Visiting Team" options. Press L, R, L, R, A to play as the Jacksonville Jaguars; or L, R, L, R, Y  to play as the Carolina Panthers in an exhibition game.
Note: Players on both teams will be rated as 99 in all attributes.

One minute game:
Start a game, choose teams, and Select normal mode. Highlight the "Game Time" option and press L, R, L, R, X The game will begin with fifteen second quarters.

Glitch: Onside kick:
Do an onside kick on a kickoff, but actually kick the ball.  Enter the instant replay to see half the other team's players standing, while your own players are making the tackle.