I don't remember which game. The A500 came with the 3 disks from Commodore: Workbench1,3 (no games on that one), Extras1,3 (no games as far as I remember, or it must be an odd BASIC game that I had no idea of on how to use it) and Commodore's Dutch introduction to the Amiga: Amiga Stap voor Stap.
There was also a FredFish disk collection of 10 floppies, can't remember anything usefull on those. So my guess would be.... either Warzone (the game with the little tank) or Protector. If I had to put money on it: Warzone! That were the days... 1988... I was like 16 or so.