I think every kid I was friends with growing up had a “Merlin”. It was a red hand held game that consisted of six different games, some of which could be played against the computer or against another person.
It was not a very appealing toy; it was rectangular device about eight inches long and three inches wide. The play area of the game consisted of a matrix of eleven buttons; each button contained a red LED. It looked like an over sized phone. I remember how addicting this game was and all the fun we had playing this as a kid.