If you exclude things like cards and board games and it had to be electronic... that would be my Sky Jump pinball machine from 1974. A full electro-mechanical pinball machine that probably did a number of years in a bar somewhere before finding its way to me somewhere around 1987.
http://ipdb.org/machine.cgi?id=2195Portable game would be Blip by Tomy. which goes back to 1977. A mechanical pong like game that uses a series of gears and cams to move the ball and 3 buttons per player to act as the paddle. The only electronics in it is an LED that indicates the ball. Movement is powered by winding the timer and scoring is mechanically advanced when you guess wrong on where the ball will land.
I picked it up in a thrift store in 1981 for like fifty cents... which was a major score for a kid my age back then.
https://en.wikipedia.org/wiki/Blip_(game)
For consoles I have the launch titles for the Atari VCS (1977), but they are not the copies I grew up with. that original heavy sixer and about 70-100 titles disappeared into a box when my parents recently moved so my current collection is starting from scratch a couple years ago. I do however have my original Magnavox Odyssey² (1978) although it was after the switch to built in controllers and the games, voice module, and they were bought starting around 1980.
