It also, in the early 1970s, tried its hand at electronic card games. In about the most bizarre way imaginable.
This is Electro Poker, released in 1971. It worked like this: you picked up a light gun (something the company had some experience with) and shot it at the central unit. Once a "hit" was registered, five card faces would spin for a while then come to a stop. The hand you ended up with determined your "score".
And...that was it. Expecting more? Come on, this was 1971. You wanted fancier rules, you needed to come up with them yourself.
You can see more pics of Electro Poker, including score sheets and its instruction manual, below.
Nintendo Electro Poker (エレクトロ ポーカー, 1971) [Before Mario]