hukutka94 wrote:Is it possible to complete all game without the help of guides/documentary/f.a.q. and other information, just playing?

I agree you no need to follow guides to finish most of the content, but there is no reason to not touch Documentation which is more like introduction to the mod and is focused on showing differences from the classic D2. I guarantee that most ubers will be challenging even if you will read Quest section, also after you will get familiar with game and finish whole content there is still Hardcore mode which can take you on a neverending trip.