The missions in this game are grouped into several "stages". Each stage has a number of non-linear missions, which you can do in any order. Each stage also has a fixed mission that you have to complete at a certain point. You only need to (or rather, the game only lets you) do about 6~7 missions per stage, then you move on to the next stage.

The stages are:

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.