One of the best survival horror games.
Having been a fan of the series ever since I got my copy some years ago, Clock Tower has proven to me time and time again that some games are scarier than others: This is one of them.
The reason why this game is scarier than the other games you'll find in the survival horror genre is because you aren't shooting enemies with guns, heck, you aren't even given melee weapons to defend yourself. The only way to "defend" yourself is to find spots within each scenario of the game that allow you to hide, and occasionaly you're able to throw an object at the enemy of the game: Scissorman. Scissorman is what makes the game so scary -- he's chasing you around various locations, with a giant pair of scissors, trying to murder you and the only choice you have is to hide or be killed when he shows up.
The game is different depending on who you end up playing as in the beginning, you'll either end up playing as Jennifer Simpson or Helen Maxwell after the introduction, depending on how many times you speak to Harris in the hallway when you're playing as Professor Barton in the beginning. This allows for a variety of ways the approach the game, but based on your own decisions throughout you'll end up in different places and will have to make the right decisions to end up in the "final level" so to speak. There are more than one or two ways to go about getting through a scenario and sometimes you'll have to think before you finish with a scenario, making sure you've done everything "right."
There aren't neccessarily "flaws" in the game, but moreso things that make the game difficult sometimes. The first is the controls: It's a point and click game, so you'll have to yes, point to an object then click. This game would have been great if they'd also released it onto a PC because then you would just need to use your mouse to play. The second "flaw" would be the fact that sometimes you'll forget to save your progress and may die in a room. Sometimes there's a way around Scissorman and other times you'll simply realize you're going to die over and over again because there is no escape / item to save you. However, if you use your wits, and you save your game frequently you're less likely to encounter situations such as these. As for the controls, well, you get used to them.
Clock Tower is probably the best in the small series, or rather, the scariest. The later installments are pretty good as well but nothing will beat the first installment (there's also the original installment but it was only released on Super Famicon in Japan).
In the end, if you see the game for cheap, you won't be disappointed in spending the extra money on it.