Grand Theft Auto: San Andreas Easter Egg - Retro Gaming

When ding the mission Madd Dogg's Rhymes for OG Loc go to Madd Dogg's mansion and sneak through to the bar area.

After you've snuck behind the counter you enter a room with a guard playing a computer console.

If you listen to the sound effects of the game he is playing you can hear the breaking and crashing sounds from the early 90's (then new) game Micro Machines released on the Genesis/Mega Drive!