Armored Core 4

Easy money and schematics:
Select a good AC to start with then get to at least Chapter 3.
Start fighting the sim ACs in the ACSIS menu. A good amount of
money is given out per fight, and as a bonus you get the defeated AC's
emblem and schematic. You can use the defeated AC schematics to defeat
more ACs because you only need a buildable AC to start a mission,
and not a sim. The only drawback is that you can only use AC schematics
that can be tuned to a certain level. If you have enough points to tune
the AC up then you can use it, otherwise it will be highlighted in
red instead of yellow or white. You can also use schematics earned
in the sim online.

 