Many years back, at a caravan park games-room they had ping-pong, pinballs, pool, and a cocktail table Space Invaders.
I had little money for the videogames and pinball.
Some older kids had figured out that going to Space Invaders and flicking the wall power switch off, for a tenth of a second, would sometimes give an odd-number of free credits.
We played 7, 21, and then maxed out the registers at 99 credits.
Everyone played in rotation all day and turned it off with about 20 left.
The best card game I've played is Innovation.
Cards contain different icons, which indicate supremacy for the player who is displaying the most of that icon on their tableau.
Supremacy means that a player can demand things of players who are showing less icons.
The standout card-mechanism is when you perform an action to 'splay' one of your stacks of cards, thus revealing extra icons from the cards below.
An elegant and exceptional game.
Highly recommended to try.
Available to play online, with a free account, on yucata.de:
https://www.yucata.de/en/GameInfo/Innovation
Review here:
https://islaythedragon.com/game-reviews/sprint-through-the-ages-a-review-of-innovation/