Nibiru: Age of Secrets that won't be unveiled
As for the main character – Martin Holan – sometimes, he can behave foolishly and naive like a child (the ease of stepping into traps) and sometimes he can be very "rude" for others.
The game itself is not too difficult but some puzzles and riddles can make you nervous. Especially when you forgot to save the progress, because there is no "reset" button. And some others with easy solution need you to proceed in some special way that seems a little odd. There are also two time missions but you should not worry about them – there is no danger to die in this game (with one exception however). There is also no possibility to omit some important things that you could use later in the game – some spots and objects are not available until you unlock others. This way the game is linear and safe. One more thing that was for me somehow "disappointing" - the ending, but it's not that bad, it just leaves some kind of "unfulfillment".