Now that is super-cool. I also had an Amiga 500 but never got to play anything that supported connecting computers together with a null modem cable. I didn't get my Amiga until 1990 but multi-machine multiplayer would have been absolutely living the dream for me at that time.
Those head to head player games were great, but there was one catch on the Amiga.
The DB25 serial port on the A1000 (first Amiga) was different from other systems of the day. Not just the obvious gender difference, but the pinouts were different as well. I knew a couple guys who tried a A1000 <--> A500 hookup, and blew one or both computers.
