Condition Zero is now comprised of a set of various unconnected missions where you play a part of a Counter-Terrorist team. How these missions and environments will be presented to you will vary between scenarios and locations. Some will include the lead in with cinematics such as you are flying in on a helicopter and you get a briefing from your commander on board. Other situations you will just be thrown right in to the middle of a scenario and be given vague details of what is going on and a limited time to escape or complete whatever else your objective may be. An example scenario as described by Erik Johnson ... [snip]

If you're feeling nostalgic, here's the old preview from back when Gearbox was working on the title.