Listen up shock-trooper, Master Chief is out running some errands, forcing us to rely on the likes of you to save New Mombasa city from certain destruction. We realize it's a large burden to place on you lowly soldiers, but it's all we've got. Thankfully, we've worked with the experts at GameSpot Guides--who unbeknownst to many, are experts in modern warfare--to prepare a field guide that should walk you through any combat situation. Move it out soldier, you're all we have left.

Here's what you'll find in GameSpot's Halo 3: ODST game guide:

• Bungie Software
• Sci-Fi First-Person Shooter
• Release: Sep 22, 2009
• ESRB: Mature

• Combat Training: Even elite soldiers can use a refresher.
• Enemies: Gain insight into the enemies you'll be facing with our dossier.
• Vehicles: Attend our driver's ed class to enhance your skills in each vehicle.
• Walkthrough: Check out our point-to-point walkthrough for the entire campaign, optimized for Heroic difficulty.
• Xbox 360 Achievements: Learn how to obtain this game's every achievement.