It was a game about a virus or something
Most likely 'Epidemic'. Quite a complex example of the collaborative team board game - a better one to start with would be 'Forbidden Island'.
I've by no means got this cracked (all DS wants to do is game with or without friends!) but here are some non-screen ideas for when friends come.
Crazy catch in garden. Or any other skill game (badminton net/basketball hoop) where they can challenge themselves to try and improve their 'best' score, but it goes back to zero when they 'miss'. DS and his friend made up an elaborate game where one was on the swing, and the other threw a tennis ball to coincide with the swing trajectory and they got a point each time when the swinger kicked it and the thrower then caught it. (Or something!)
Cooking - unfortunately it will probably need to be something unhealthy like brownies to get them interested, but it gets them off the screens.
Walking dog/doing an errand that gets them out of house. Or any house/garden chores e.g. clearing leaves/cleaning cars that you can pay them for. Amazing what 12 year olds will do for £1 cash!
Making bonfire in garden. Not very enviromentally friendly but all kids love burning stuff.
Metal detector for the garden. They get quite excited about the potential that they might find something of value, even if the best they get is a nail.
Sometimes to get DS and his friend's going on a card game or board game, I need to set it up right, so a dedicated table, crisps in bowls, hot chocolate, game ready set up, etc. If I say 'play a board game' they refuse, but if it's all set up for them, ready to go, then they will happily play all afternoon (as mentioned above, 'Forbidden Island' is a good one for that age).