Elder Scrolls III: Morrowind. An amazing game set in the same world as Skyrim and Oblivion. Consider checking it out, you can buy it on steam and I suggest playing it with "OpenMW". It's a fan-made complete rewrite of the game engine, which fixes a lot of bugs and shortcomings and provides the ability for more modern stuff (running and optimizing it forobile phones, scripting language, modern graphics shaders etc).

Even though it's old and and you have to read a lot (soon the AI voice lines mods will drop however) it's an amazing RPG and really weird. Just for reference:

• There are cat people who love drugs and they once believed that the moon was made of drugs so they just stacked themselves on top of each other to reach the moon
• Two ancient civilizations had space programs
• There's a guy who turned himself into a hermaphrodite god and then had a relationship with the god of rape. When he had enough of fucking and getting fucked, he bit off the god of rape's penis and made it into a spear. When the goddess of love and beauty told him to stop being such an asshole, he shoved his "spear" down her throat.

Edit: Story wise, the main story is probably one of the most creative stories I've ever seen. However, to really enjoy it, you need to either pay close attention to what people are saying, read the in game books, investigate and think for yourself, or read summaries on the Internet.

Edit2: Sorry, I just can't stop talking about that game which I've been playing for 2/3's of my life. It also features real racism onf display, discrimination, political and religious intrigue and corruption. The problems in this world are often very, very real.