Caravan is the easiest game in the world...with the worst rule explanations (unless it was patched).

General:

The game starts with three columns known as 'caravans'. Each player uses their cards to make 'bids' on th caravans that are between 21 and 26 points. The game ends when each caravan has a legal bid, and the winner is the person who bidss the highest legal amount on at least 2 of the three caravans.

So if the board read

21 15 22
17 26 21

then all three caravans have bids between 21 and 26, and the top player wins since he outbid for 2/3 caravans (21 is only legal bid on the first column, and 22>21 in the third).

Card rules:

The game explains this pretty well. Just make sure you are using the arrow keys and not the mouse to do placement of the cards (mouse wont work). Basicaly

Jokers: Great for convoluted decks as they can rape the computer if used right.

Kings: Great offensively and defensively. A deck consisting of only Kings, 9s, and 8s ends games super quick because you can make a caravan with three cards, dont care about order or suit, and also have ways of using excess kings to attack

Jacks: Great offensively. Less so defensively because i cant recall any npc ever attacking my caravans.

Queens: LOL why would i ever use these?

Some standard decks include

Kings and Jacks with either 98, 87, or 876 depending on what you can make

Two suits: only use two suits, then include the other two suits' aces and some jokers to destroy the opponents caravans

I dont remember others, the KJ87 is my std due to not having enough nines and its impossible to lose

Other note: The highest wager i had was 5k on a single game, and most ppl will steadily decrease their bid when you win (like, next game was 3.7k or something iirc) and they always increase after you lose.

Glitches:
-You can discard indefinately during the start up round and your opponent doesnt act in the process. So you can basically start with any starting hand you wish.

-Bought cards havent been automatically going into the caravan deck. Putting the cards into storage, closing the container, then opening it and taking the cards fixes this.