The Underground Man is a post-apocalyptic adventure game developed by Mehsoft. It is set in Moscow, where the Earth's surface has turned into a radioactive ash, and the survivors are living a savage lifestyle. The game features a unique storyline where the player is one of the underground people, who decides to make a journey into the big world. It is to prove to the people on the surface that the underground people exist and that they possess the ability to adapt to the extreme conditions of the wild radioactive desert.

The game has enjoyable retro-graphics and extremely detailed characters. The cozy bar is the location where the player starts their journey. It has a unique system of character development, where the player writes their own storyline and applies it to their adventures. The player can also hire mercenary-girls to help them during their journey.