Games go through countless changes before the developers settle on a particular style, setting and feature-set - for instance, BioShock was initially a game about a cult deprogrammer, while Tiger Woods PGA Tour 2005 was originally a knockabout karting game starring Jack Nicklaus and Rory McIlroy and Donkey Kong. The recent Tomb Raider reboot is no exception. In an alternate universe, we're playing a game featuring horse-riding, a child companion, oh and giant colossi that burst out of the Earth. Yep - Tomb Raider was originally Shadow of the Colossus 2, as revealed in the game's Making Of thing .
Other titbits: the game was originally subtitled Tomb Raider: Ascension, before Kratos from God of War sent Crystal Dynamics a very angry cease-and-desist letter attached to a wriggling Gorgon head. Maybe. There were also flamethrowers, more open environments, and a giant untextured carrot lurking menacingly behind a little girl. Here is proof of that awful thing: