The classic multiplayer card game. Play live online against thousands of other players, or train offline against the computer. 

Schnapsen is a free card game played with a deck of 20 cards, with five card denominations of Ace (the highest valued card), Ten (the second highest), King, Queen, and Jack (the lowest valued card). 

The objective is to score as many points as possible by playing tricks and utilizing the special abilities of certain cards.

It's free of charge, and easy to learn, but you will need to develop good strategies and tactics to beat your opponent.