The download marks are wrong. 22 MB is mac version and 12 MB is windows version.
Covert Front Episode 3
A downloadable game for Windows
Covert Front is a point and click spy game, where you become an agent code-named Kara and investigate the disappearance of general Karl von Toten.
The plot takes place in 1904 but in a different reality-line, where the first world war has already begun due to earlier technical revolution that took place in the mid 19th century.
Story written by Karol Konwerski.
Game is divided into four parts, all being chapters of the same story.
No installation needed, it's a standalone game. Just download and unpack it.