Level 2 trigger considerations

```
Currently, Mission 5 of level 1 is only triggered after all buildings have been
restored on Achilles and Mission 4 is complete. This allows the player to
elongate level 1.

Certain player seem to get stuck despite the objectives and expect a quicker
jump to level 2.

Alternatively, a custom campaign could be derived where the player starts from
level 3 to skip the tedious intro levels.
```

Original issue reported on code.google.com by `akarn...@gmail.com` on 18 Jul 2012 at 1:10