Hold Your Ground

Hold Your Ground is the thirteenth level in Metal Arms. Following the destruction of the Comm Arrays, Glitch receives word from Colonel Alloy that the Mils are on their way to examine and repair the wrecked communications relay. Glitch is tasked with destroying all the intercepting Mil troops before they can enter the Compound. Grunts driving R.A.T.s  and Predators are the adversaries Glitch must fend off. This level has a speed chip time of six minutes and thiry one seconds.

Trivia

 * This level is notorious for being the most complicated one to complete without failing at least once. This is difficult in Easy Mode and is almost impossible in Nuts of Steel. Due to the spontaneous nature of the Mil spawns, it can be challenging to prioritize your targets effectively. This defense is performed in three waves, with the Mil resistance only increasing as Glitch progress through them. The incorporation of the speed chip is also annoying, since re-spawning doesn't undo the time used in prior attempts of the same play-through. Just failing once exceeds the necessary time to acquire said speed chip.
 * This level introduces the Predator. While it is an airborne hostile, the Predators in this level ignore Glitch entirely, only focusing on entering the compound through the air. Diverting attention to them can be frustrating due to the influx of Grunts in R.A.T.s that keep approaching from the ground.

Cut Dialogue(?)
While not necessarily confirmed for this level, Colonel Alloy has some dialogue left unused within the game's files. While they don't directly indicate events specifically, the remarks used seem to compliment Glitch's ability to destroy Mils or comment on his failure. These lines probably would've suited this level the best due to the lack of music and added repetitiveness of the defense.

The lines are as followed:

"You're doin' great, kid!"

"Got em' by the thread of your bolts!"

"Do I need to come down there and show you how to do it!?" ~ This might also work for Droid Town defenses when Glitch flees from the active battles.

"Kid, don't be afraid to use a few rounds!"

"Now you've got the hang of it!"

"Argh, you blew it!"