essentially you tear the sheet to see whether you succeed or fail.
It was produced by Jim McClure (of Talking Tabletop) and they even did a let's play based on the 80's.
http://therpgacademy.com/field-trip-to-a-tearable-80s-action-flick/
became a fan a year ago when hearing it on Happy Jacks RPG Podcast . It's essentially a stripped down vision of dnd in the late 70's with a modern vision