Castelon was ultimately cut due to a lack of time, and most of the assets intended for the planet was repurposed for the Bring Down the Sky DLC.
Notably, however, it also gave the player the ability to play as your squadmates (and make Shepard a computer-controlled ally), and the combat interface was much more intricate and involved than what eventually appeared in the final version. The beta version of the game featured a number of elements that were not included in the final product, including a different default character model for the male Shepard (before they brought Mark Vanderloo on to provide the face-capture model), a different voice actress for Ashley, different default armor for Garrus (who also does not wear a visor over his left eye in this version) and a completely different Galaxy Map.
