This is by far one of the biggest ways I have procrastinated in my entire life.  This is a “simple” 2D space shooter internet game that came out around 1995 when I found it on-line in my freshman year of college and have spent sick amount of time playing since.  In fact thanks to a lovely in game command I have spent over 4971 hours in the game since September of 1998 which is when the official records were restarted.  It is grossly addictive for being an old game.  I had given it up for awhile but am back at it again.

subspacedownloads.com