Call of Duty: Modern Warfare 2 fans can expect a number of changes and additions with the sequel. Traversal is receiving a boost through ledge grabs and dolphin diving, the Gunsmith is being improved through the use of platforms and shared attachments, and fresh modes like Invasion and Knockout give players access to never-before-seen experiences. The game also makes a brilliant change to killstreaks, and it should not be a one-off feature.