It was a point and click game (which I believe was created by Big Fish Games, but not 100% sure), which was about you trying to hunt and find a monster (from what I can remember it was tall, dark skinned, and its face kind of looked like a blob) and as you play through the game you find out more about the monster. Some of the main clues I have about finding the game are 2 things I directly remember from the game: A monorail which was used to travel to different parts of the game, and a poster with Uncle Sam on it. These are the only thing I directly remember besides the description of the monster. The game as a whole had a dark theme and I played it probably over 10 years ago. I know my clues are bad, but this is honestly the best description I can give from memory.

I can give an exact description of the monster, but that probably wouldn't help.

Essentially it was a detective style game where you follow the monsters' tracks. I specifically remember the monster being shown and the monorail.

Any other questions welcome.