Metal Arms: Glitch in the System/You Know the Drill
From SDA Knowledge Base
Route to be posted later....
According to the shop prices list You now have the option to buy either the Level 3 Rivet Gun, or the Level 3 Rocket Launcher. While the Rocket Launcher is marginally more useful for this level, the Ripper is almost a necessity for the next level, as it can kill/disable Predators much easier. As a secondary upgrade, it is preferable to choose the Level 2 SPEW(if you didn't alrady pick it up in "Infiltrate the Compound") or the Level 2 Control Tether.