NASCAR Rumble is a racing game by Electronic Arts for the PlayStation. The player or players can race through 18 different courses set in six different areas collecting powerups to aid them. The game was met with fairly positive reviews, and currently has an 80% on GameRankings. In NASCAR Rumble, the main object of the game is to win a race or series of races against one to five opponents.

They race in normal or souped-up stock cars from the at-the-time NASCAR Winston Cup Series, in addition to several Craftsman Truck Series drivers, unlockable past NASCAR legends, and everyday vehicles. An interesting feature of Rumble is the power-ups. These can be collected and used for assistance. Players may also choose how often these appear. (Wikipedia)

Here's a list of passwords that might come in handy while playing the game:

Passwords

Misc. Passwords
KMZWA8AWAA - All Cars, Tracks, and Legends Unlocked

KMZWAY87AA - Unlock ALL Cars, Track, and Difficulties

C9P5AU8NAA - Unlock Pro cars

Unlockables

Unlock Legends
To race against the legend of a series, get first place in that series. Then select "Legend" when choosing what type of Championship to play. To unlock the legend, you have to get first place. You have to do this for each mode (rookie, pro, elite).

Unlock Alan Kulwicki - Get 1st place in Gold Rush

Unlock Benny Parsons - Get 1st place in the Wild Card Cup

Unlock Bobby Allison - Get 1st place in Beach Blast

Unlock Cale Yarborough - Get 1st place in Metropolis

Unlock David Pearson - Get 1st place in Southern Exposure

Unlock new modes
Unlock Elite Mode - Get gold on pro mode's six main series, and the EA cup

Unlock Pro Mode - Get gold on rookie mode's six main series, and the EA cup

7 minutes of pure "old-gen" racing, NASCAR-style: