Cameron has also often worked in Christianity-related movies , among them the post-Rapture movies Left Behind : The Movie , Left Behind II : Tribulation Force , and Left Behind : World at War , in which he plays Cameron `` Buck '' Williams . Aside from this , Cameron has often worked in Christian-themed productions , among them the post-Rapture films Left Behind : The Movie , Left Behind II : Tribulation Force , and Left Behind : World at War , in which he plays Cameron `` Buck '' Williams .