Your nation has long been at war with an aggressive enemy people known as the Breakers, and though your forces have been holding them back on the eastern front, the situation is worsening in the south. To make matters much worse, intelligence has discovered that the Breakers have built a single nuclear weapon and fitted it to a long-range missile, and within two weeks they'll be in a position to launch it against your forces and achieve a quick victory. The missile is housed at a secure base built into a river canyon.
The top brass agrees the missile must be destroyed immediately, but that an all-out assault would likely fail given the strength of the Breaker defenses surrounding the base. Instead they call on you, a decorated member of the Special Forces, to assemble an elite four-man team and lead a covert mission to infiltrate the base and detonate the missile before it can be launched. You pick your three teammates — a sniper, a demolitions expert, and a heavy gunner — and are soon flying on a stealth helicopter to your drop-off point near the base. Being deep in Breaker territory, extraction won't be possible, so once the mission is complete you'll have to find your own way to safety.