Colorado Solitaire is a free PC game with 20 piles for cards to be placed on without adhering to rank or suit. It uses 2 decks and includes 8 foundations.

One of the significant highlights of this game's mechanics is that it has eight foundations, with four of them built upwards and the other four built downwards by suit. This unique feature challenges players to think strategically as they work to assemble the foundation piles successfully.
Overall, Colorado Solitaire is an excellent game for those who enjoy playing solitaire games on their PC. The game's easy-to-learn rules and exciting gameplay mechanics make it an enjoyable experience for players of all skill levels. Give it a try, and you won't regret it!
Version 1.0: New Release