Pacific Fighters has several modes of play; these modes include Single Mission, Pilot Career, Multiplay, Quick Mission Builder, Full Mission Builder and Training.
Single Mission Mode is just like it sounds. You get to fly in one mission and then it's over. This is great if you need a quick fix and don't want to get involved in the larger modes like Pilot Career. In this mode, you select a country, then a mission type (dogfight or bomb run) and then finally the mission of your choice.
Pilot Career is where you find the bulk of Pacific Fighters. This mode is further broken up into two branch types. The static branching type is a set order of missions. The missions you will be assigned are the same no matter how you perform in each battle. You can define these missions by using the two Mission Builder Modes.
The other branch is the Dynamic Campaign. To start this mode off, you select a country, a squadron and the planes that you want to be available to you. Each time you start a mission, almost every feature of that mission is determined dynamically. The weather condition, the opponents, even the time of day are created on the fly to keep each mission different and interesting.
In the dynamic branch, Pacific Fighters keeps track of which fighters have been lost or how well they performed in battle. As you progress through the war, you will have wing-men get promoted, replaced or otherwise change depending on the actions of each mission.
The multiplay mode allows you to dogfight against 31 other players or go into Cooperative Mode with 15 other pilots. Dogfight Mode is a lot like the Single Mission mode described above, except here you get to personalize your fighter with a wide assortment of camouflages. Cooperative Mode throws you into a lobby with a group of other players. When a mission is handed out, you all work together to accomplish the goal.
Along with these modes, you can also add new profiles in the Pilot Roster or play back your adventures in the Play Track Mode. In the View Objects Mode, you can go through a gallery of the models from planes to aircraft carriers to trains.