A sequel to Far Cry Instincts, sharing the same name except for the addition of the subtitle Evolution, was released for the Xbox on March 27, 2006. Evolution includes a new single-player campaign, although it is considerably shorter than the campaign found in the original Far Cry Instincts.
Evolution also includes new weapons and vehicles, as well as an expanded map-maker and an extra multiplayer mode. Maps that are created on the Xbox version of 'Instincts' cannot be transferred to the Xbox 360 version.
Source: Wikipedia, Far Cry Instincts#Evolution , available under the CC-BY-SA License.