Some noise. Bryan, young cleaner, wakes up thinking "Again those old bastards..." When he comes out of his room something falls on his head and he blacks out... So that's how our mod starts. Our mod tells of a story of the unlikeliest hero... Not Calhoun... Not Freeman... Not Shepard... It's Bryan Anderson! Are you surprised? He's nothing unusual. You will feel how it is, to be a simple cleaner, not some scientist or soldier, to run, think, shoot, live, who doesn't have the expertise to deal with any extreme situations, who haven't known where he must go... But, as usual the most dire circumstances is a experience that will bring about the determination to succeed no matter what comes his way. Monsters, soldiers and even his friends will try to stop him. But he won't stop, bravery and determination is realized because his aim is freedom. Would he find this freedom or not? It's up to you. This is Half-Life: Cleaner's Adventures...