This series of games is by Ben Croshaw, also known to several as 'Yahtzee', the game reviewer. Anyway, the games are in the horror genre, and all revolve around a being named Chzo, who is the last of the pain elementals and the closest thing there is to a god of pain. Anyway, the games are mainly point-and-click, but the controls all change from game to game, the first game being a mixture of typing and point-and-click, the second and fourth game entirely point-and-click, and the third being entirely typing. To avoid spoiling anyone who doesn't want to be spoiled, the links to each of the games are here, with information about each one.
http://www.fullyramblomatic.com/5days/ (http://www.fullyramblomatic.com/5days/)
http://www.fullyramblomatic.com/7days/ (http://www.fullyramblomatic.com/7days/)
http://www.fullyramblomatic.com/notes/ (http://www.fullyramblomatic.com/notes/)
http://www.fullyramblomatic.com/6days/ (http://www.fullyramblomatic.com/6days/)
Also, there's another game that involves the main playable character in most of these games, Trilby. It takes place before all these game, and is an entirely different genre of game. It's called Trilby: The Art of Theft and is quite a bit more gameplay-based rather than story-based. It's a platformer.
http://www.escapistmagazine.com/content/games/yahtzee/artoftheft (http://www.escapistmagazine.com/content/games/yahtzee/artoftheft)