The Humble Introversion Bundle is now available and they include; Uplink, Darwinia, DEFCON and Multiwinia. The games featured on the shelf work natively on Linux, Mac OS X and Windows.
Pay what you want. If you bought these games separately, it would cost around $70 but because it’s for charity, you set the price. You choose exactly how your purchase is divided: game developers, and charity. Install as many times as you like, and redeem all of the games on the shelf on Steam. Time to dip deep into your pockets and help charity.