From the introduction:
dREAL is designed to support roleplaying games about relatively normal people in a world that works like reality. This ruleset is not designed to support roleplaying games about heroic characters with larger-than-life attributes and an ability to triumph against impossible odds, or to simulate the narrative immunity of main characters in TV shows and comic books. In short, dREAL tries to simulate, more or less, what life is like in the real world.
This is the "light" version of the rules.