I love the card games in the forces, the big one in the engineers is Yuka (not sure if that is how you spell it!) pronounced yoo-kah. It's basically trumps played with 9's up, with the exception of the 2 of spades, or benny, which is always the top card. The trumps suit sets which jack is higher than it's coloured brother, so if hearts is called, then it goes benny, jack hearts, jack diamond, ace hearts, king hearts, queen hearts, ten hearts, nine hearts as the trump order. Any suit can be called, so if the black suits are called, then the black jacks become the second and third cards in the trump run.
You play with a partner sat opposite diagonally from you, four players in altogether. Each player is dealt five cards and the idea is to win as many tricks as possible whilst scoring in a very complicated manner using the four and five number left from the deck of cards to show how many points you have!
Bloody complicated game, you have to play it to learn it, which means you lose a lot and buy loads of beer whilst getting slapped repeatedly by your partner and being called every derogatory name under the sun for screwing the game up! They call it character building!
Another firm favourite was Sh**head! I promise you, it is an actual game! You get dealt out equal number of cards, and the idea is you start off with whatever is laid and have to beat it as you go around. You can lay a group of cards of the same value, so if you have three threes' you can lay them all together. Some cards do special things, such as skip a player, reverse direction of play, clear the pile of cards, and all other manner of good stuff. If you can't beat the card laid down, you pick the whole pile up! You have six cards on the table that are played at the end, three face up that you can see, and three blind cards. It gets exciting at the end!
basically, you need to end the game without any cards in your hand, the last person playing gets repetadly called a sh**head by the remaining players and pointed at and ridiculed! he then deals. If you talk to him during the dealing, you become sh**head and take over dealing!
Great fun!