Wikipedia wrote:

Manhunt is a third-person stealth horror game. The game consists of twenty levels, and four bonus levels that can be unlocked; the levels are referred to as "scenes". Players survive the Scenes by dispatching enemy gang members known as "Hunters", occasionally with firearms but primarily by stealthily executing them in gruesome, over-the-top ways.

Wikipedia wrote:

The game's setting presents a considerably more macabre rendition of Wonderland than seen in Lewis Carroll's original portrayal. Wonderland, being a creation of Alice's mind, has been corrupted by her insanity. Alice's primary objective is to save Wonderland, and in doing so restore her own sanity.