Reality hacker

1. Urban spelunker. "Building hacker" is a better term than "reality hacker" for this kind of activity.

2. Explorer, by the use of any tools available, of the underlying reality of existence. Science is an important subset of reality hacking. Classical mysticism is another. The hacking part means, as with other forms of hacking, learning of capabilities that the ordinary user may never realize are in the system.

3. The name of a defunct magazine.