SCP Containment Breach is an open and free download horror game based on the erotic fictional stories of the SCP Foundation web site. It's set around a world in which the objects contained within are being threatened by creatures called "bugs". These creatures are a variant of the stereotypical "protector", and they're after the items that stand guard over the" SCP's" pages, protecting them from the creatures who want to eat them. Fortunately, there are a few things you can do to stop these malevolent spirits from taking over the web.
The story begins with you, as the last remaining member of your team, checking out the containment breach protocol that is supposed to keep your data and personnel safe from the "bugs". You spot two men outside carrying something that looks like a suitcase. After checking what it is out of the box, you follow them into the woods where they seem to be keeping guard over several boxes of "important documents". As you investigate, one of the men is stabbed through the leg by an unseen assailant, while the other flees in a panic. With no time to spare, you then have to deal with the situation by yourself, while the others look for help.
This is the basic premise of containment breach; while playing this game you must use a combination of observation skills and logic to figure out how to avert the danger. Each stage is quite action-packed, and the puzzles are designed to stump even the most seasoned puzzle gamer. There are several areas in which you can explore, and the items used to solve puzzles are collected via the "science" bars on your science helmet. The entire game is designed to raise questions, to make you contemplate what would happen if the current containment breach happened, and the eventual consequences of such actions.