[MikeDelta]

I remember the game Double Dragon on DOS where you could play co-op using one keyboard. Less impressive with just a few buttons used, but a lot of fun.

[arp242]

It was pretty common for games of the era. You could play Settlers 2 with a split screen and two mice! I had a lot of fights with my friend about whether one of us looked on the other half (being 10 year olds, we of course did all the time).

[matheusmoreira]

I used to do this a lot as a kid. Liero was the game. Emulators too. I still prefer playing games with a keyboard to this day.