My bro and I invented a card game called: Area 52.
It is the standard card game war: High card down, higher card gets both.
Except in war, you place two cards down each, and play rock paper scissor. Ties are two more cards down.
One more rule, after you place one card down say a 7, and the other person places a card down, say a 9, the lower card player may opt to hit to wager another card. If lower other player gets all 3. If higher the hitting player gets all three but the other player may opt to hit too, which wagers 4 cards out there…
Any time someone is decked they lose even if anteing cards down for rock paper scissor, they lose even before getting to play it if they’re out of cards.
We like the card game war and wanted to have it have skill elements, but it is so much skill to get advantage that it is mentally taxing. You’re constantly counting cards while shifting stances to get lots of cards (low quality cards in your deck) or take out their quality cards(high quality cards in your deck)… At the same time, Roshambo of a targetted player, you can think one step ahead to know what they’ll put out in an extended series and like 20-40 rock paper scissor events happen. It’s a freaking amazingly good game for how simple it is, but your mental will be draaaaained if you play it in a competitive fashion.
I may put it in Starfighter General, but you should try this at home!