"How many times have you gone through it?"
About 1.2
I played the demo a bit past the end; if you save and re-load after the official end, you can keep going. Some of the graphics were not included, so (for example) the traveling merchant on the path to the cursed Abbey was invisible, as were some monsters. Then I played the game through once as a warrior, and did the Aleroth catacombs on hard with a survivor.