Today's game is a simple mouse clicker game called XBill that was made for X Windows back in 1994. It was quite a popular game in the late 90's to early 2000's.
The story is fairly simple, a hacker called bill has made a virus masquerading as a popular operating system, and has deploy many clones to deploy it. Your job is the prevent Bill from putting his virus on your computer network by swatting his clones.
Be careful to swat them all or you computer will become a toaster!
The games website:
http://www.xbill.org/