Games : Desperate search for a childhood game [on hold]

I'm looking for a childhood pc game I used to play about 10 years ago. It was basically some cars/spaceships running all in some maps, destroying each other and grabbing items. The particular thing that i remember is that when 3 nuclear items where grabbed, there was a count down, in which all the cars/spaceships had to run to the center of the map, if they didn't want to be destroyed by a nuclear blast that affected all the map (except the players in the middle).