The original Nintendo (NES).
Only 3 choices here IMO:
- Tecmo Super Bowl: Same game play as the original. But had all the teams and the game had memory. You could play a season and the game would keep your stats. And also unlike the original, you had 8 plays to choose from on offense and defense vs 4.
- Baseball Stars: Great graphics for the time and great game play. Plus the game would keep your stats. You could build your own team from scratch.
- Mike Tyson's Punch Out: Amazing game in a time when Iron Mike was an icon. What was the secret passcode straight to Mike again? Up up down down left right left right ab ab.. No clue. Something like that.
Pick one or nominate another. Although I don't think any other game would even crack this top 3.