"I took a screenshot of one of the files because it had a .hl3 extension. HL stands for Half-Life. There are currently only these Half-Life games, which aren't considered as Half-Life 3: Half-Life, Half-Life: Opposing Force, Half-Life: Blue Shift, Half-Life: Source, Half-Life 2, Half-Life 2: Episode One, and Half-Life 2: Episode 2.

This is an original screenshot."