After playing adventure and computer roleplaying games for almost 2 decades I can clearly say that this was one of the best, if not *the* best experience I had sofar.
The game sets itself appart from other games of the genre that (over-)used classic medieval or tolkien-style fantasy. Instead it introduces us to a completely new fantasy setting originating in the Planescape universe of the AD&D pen & paper roleplaying series. The story is extremly interesting, non-linear and full of surprises until the very end of the game. Characters and quests are very well developed and although the game has countless side quests and interesting choices for the player, I never felt that I got lost in the game or stuck. The game features lots of dialog that truly contributes to the storyline, immersion of the player and presents content and choices that are truly part of the game advancement rather than a tedious cosmetic add-on found in many other hack-and-slash roleplaying games. The combat system is interesting and well balanced. While combat and character development do play vital roles in the game, they are by far not as excessive or repetitive as in most RPG games like e.g. Icewind Dale or even the classic Ultima series. Every dungeon crawl is followed by at least one interesting NPC encounter. Quite often long and complex quests that are not related to combat, such as investigating a crime, create a good balance between combat and dialog/exploration that may be somewhere around 50:50, which I felt very comfortable with.
Although at the very beginning things might look a little bit confusing for newbies, this game is both interesting to the RPG veteran and still suitable for the occasional or less experienced player. The reason are the many new elements of the game, the lack of really fatal mistakes in character development, absence of hardcore puzzles and the length of the game itself. This game can be completed in reasonable time, while still offering many hours of entertainment and an almost unprecedented depth of the story. The trick lies in the removal of almost all redundant and repetitive tasks that you find in many other RPGs. This makes Planescape such a dense experience. Every hour of gameplay is full of interesting content and when playing, unlike in most other RPGs, I never felt forced to "work" towards a goal. Instead, discovery, achievement and story-telling are combined in a very clever way. Even after you complete this game you will not regret the time you have spent on it. The biggest problem will rather be, that you find yourself looking forward to a sequel. A true piece of art!