The developers appear to be taking a "if it's not broken, don't fix it" approach to Dark Motives because the gameplay and interface are virtually unchanged from the original game. In fact, you could probably consider Dark Motives to be "season two" of the game. Once again, you'll play the newest member of the Las Vegas Crime Lab team over the course of five distinctly different cases. You'll receive orders from lab chief Gil Grissom, and you'll work with each of the lab investigators, including Sara Sidle and Warrick Brow. All the principle cast members of CSI lend their voices to the game, including William Petersen (Grissom) and Marg Helgenberger (Catherine Willows).