Doki Doki Panic Library [ドキドキぱにっくライブラリー] Game Sample - PC/Doujin
Doki Doki Panic Library is a PC/Doujin/Omake of sorts and is actually one of two extra games within the official "ToHeart2 XRATED" PC game, the other being "Super Sweets Scramble". It is certainly the better of the two games as well and was distributed by Leaf, who are basically Aquaplus' "adult game" branch, whereas Aquaplus mainly distributes games of all ages. A non-adult version of "ToHeart2" was released for PS2. I won't go into detail about "ToHeart2", so you can read about it below:
http://en.wikipedia.org/wiki/To_Heart_2
It features most main ToHeart2 characters (that can be played with) and a few staple modes (Fighting to the Finish Mode, Endless Mode, Versus Competition, CPU Competition, Options) as well as a rather comprehensive "Extra" mode, which hosts a variety of unlockables you can earn ranging from artwork to BGMs to even a little mini-game within a mini-game, "Awa Awa".
The game plays a bit like Bejeweled, but is somewhat original in its entirety. The object of the game is to connect three or more of the same book vertically or horizontally; so long as at least three match, they don't have to be in a completely linear fashion, so you can create little "r" shaped connections, etc. There are a variety of ability blocks as well as Wildcards of sorts. Some of these include heart blocks and bomb blocks (good blocks that remove titles from the field) or Blackhole blocks and Book blocks (Wildcards of sorts, they can prove to be helpful or complicate matters on your field), among others. There are also impedements like old book boxes. In order to break these various obstacles, you have to make numerous chains around them until you free the contents inside.
Each character also has a unique "specialty" block that gives them a particular advantage (or disadvantage) that other characters can't replicate. For example, the "main" heroine, Konomi Yuzuhara, can limit the amount of colors on the field to make easier chains, Yuuki Kusakabe can sing (she'll actually sing a song) and convert all her books into music books, Sasara Kusugawa makes many different types of books (she acts sort of as an eccentric character here and makes the game harder to play), etc. Besides the excellent little character animations for completing different chains, I'm glad to know that picking a character isn't entirely cosmetic. Speaking of the characters, they can be defeated in two ways; by either attacking them with non-stop chains and bringing their stack to the top, or getting the majority of 1000 books lined up on the shelf in the middle of the screen... whoever has less will be attacked by a relentless barrage of drops that is almost impossible to reverse. Characters execute special animations if you can do ultimate chains (around 10 or so) which are incredibly powerful and look neat.
The audio/visuals are respectable, but nothing particularly fancy. This mini-game is quite addictive and is probably good enough to stand as its own game or at least act as a good Doujin title. This mini-game also has "very slight" adult content, but I don't show anything within here that qualifies for that. This is a sample of some stuff in the game. Enjoy.