Reversi

Spider Solitaire, also known as Microsoft Spider Solitaire (Spider in the About box in some versions), is a solitaire card game that is included in Microsoft Windows. It is a version of Spider. As of 2005, it was the most played game on Windows PCs, surpassing the shorter and less challenging Klondike-based Windows Solitaire. The game was first included as part of Windows 98's Microsoft Plus! package and has been since featured on most subsequent versions of Windows. Spider Solitaire was not included in Windows 2000, but was added to Windows ME and later on Windows XP; the game gained popularity subsequent to its inclusion in the latter. Windows Vista again saw a new version, which was mainly unchanged in Windows 7. Finally, Windows 8 has another updated version available in the Windows Store as part of Microsoft Solitaire Collection but not bundled with the operating system.

Star Realms has gone insane! Introducing Cthulhu Realms! Are you zany enough to play the crazier and creepier cousin of Star Realms? Download and play today to find out why Cthulhu Realms is so crazily addictive!

The CDi version of Othello allows players to challenge Albert Einstein and Leonardo da Vinci for some reason.

Conjuror is an free to play, strategy based card game, set in a fantasy realm.

Sword Girls is a browser based card game featuring anime art style. While this is a card game, it's heavily dependent on a crafting system to keep its players occupied.

An online board game published by Berkeley Systems in which a group of players race to the top of the ziggurat, their number of steps each turn determined by the popularity of their answer to an opinion-based poll question, and the traps and bonuses set on each step of the ziggurat.

Home Entertainment Suppliers' version of digital reversi.

A version of the Pokemon Trading Card game playable on PC.

A DS implementation of the classic game of Reversi.

Artic Computing's take on Reversi