Solitaire 4x4, developed by LandSlide85, is a free classic card game version of Solitaire, but with an Italian twist. The objective of the game is to stack all the cards on the table in increasing order and by seed.

The game offers three legal moves to the player. Firstly, they can stack the cards in ascending order - this is important to win. Secondly, they can stack the cards in descending order on the table. Lastly, they can enter an empty place on the table, a RE, and stack the cards following in descending order. The game is won when all the cards are stacked correctly.

Overall, Solitaire 4x4 is a fun and engaging game that is easy to play. This is the first version of the game, and further updates are expected in the future.