Alison and Colleen: Saturation Depreciation

Alison and Colleen: Saturation Depreciation is an open-world adventure game released in 2006 for the PlayStation 2, XBOX 360, XBOX, GameCube, Wii, Game Boy Advance, Nintendo DS and PlayStation Portable. A PlayStation 3 port was also released later in 2006 to re-do the PS2 port and to help Cor-Son make extra money. This is the last game to feature Alison and Colleen.

Development
The game was built from an early beta for Alison and Colleen: Come in Peace, Go in Pieces. Cor-Son Games was going through financial issues at the time due to a lack of support from their parent company, so they determined that the best way to make their money back was by making a game for multiple systems (as a means of appealing to people ready for the next generation of gaming and those who still owned older systems.

In order to ensure the game would be ready in time, the beta was outsourced to three regional subsidiaries, with each working on ports for handhelds, sixth and seventh generation consoles and the companies would collaborate with other developers. THQ helped outsource the ports to other developers.

Plot
Alison and Colleen discover that everyone in their town has become obsessed with a generic FPS and are literally turning into zombies. The two girls attempt to stop the zombies.

Reception
The game received mixed to average reviews.