When you boot the game, it begins with a fascinating sequence where Rex and his friend Spider collide into a base and blow up everything that is in sight. Soon after, you will be a part of the environment where roaming animals have to be hunted and thirteen abandoned garrisons have to be captured amidst thugs who are patrolling the premises. The thugs move around rather discreetly making it harder for you to attack them and move safely through the corridors. When you capture the garrisons, you get perks of traveling faster, accessing the ammo store, attaining surprise goodies and going through maps that guide you to hidden chests and collectibles in different locations. If you complete the secondary and miscellaneous quests, you could make some extra money to buy better weapons. Attachments help make your weapons stronger so do not ignore them while at the store.