Instructions for the Game of Life can be obtained from Hasbro's website as of 2014. The Game of Life was originally created in 1860 by the Milton Bradley Company, which is now a wholly owned subsidiary of Hasbro.
From the Hasbro main page, browse to the Consumer Care section of the website. Click on the icon for Toy & Game Instructions. Type "The Game of Life" in the search box. Choose the version of the game for which you need instructions and click on the link. Depending on your browser settings, the instructions either appear in your browser or download to your hard drive in PDF format.