This is the fourth and final Leatherfoot Brigade quest. It requires you to find out what happened to Tippytoe since the Sarge says he can't tell Tippytoe's mother that Tippytoe is dead since his two brothers are already dead too and it would break her heart. The Sarge doesn't seem to understand that everyone including Tippytoe's mother are long dead.
You can find the corpse at the top of the spider cave at 20, 46, -253 . To get there you can follow the waterfall past the pool room. Examine the skeleton and then the box next to him. Return to the Sarge for your reward.
From what Sarge is yelling about, it seems that Private Doopy had set off the device they brought with them to destroy Fallen Gate. Apparently, Special Agent Tippytoe was the only one who had the ability to turn off whatever the device was.
I know none of this will make a difference, but I should try to find Special Agent Tippytoe. From the wreckage of this place, he could be anywhere!
I need to find Special Agent Tippytoe... if there's anything left of him.
I've found Special Agent Tippytoe's remains.
I've found the remains of Special Agent Tippytoe. It seems he stopped for a short lunch and was found.
The box next to Tippytoe looks like it might be what held the de-activation codes. Maybe I should look inside.
I need to see if I can open the box next to Tippytoe's remains
I've opened the box
I've found an odd spectral ring inside the box.
I should return to the Sarge and see how this all ends.
I need to speak with the Sarge's ghost
I've spoken with the Sarge's ghost
I've spoken with the Sarge one last time.
It seems that at the last moments of Sarge's life, he took the device and ran deep into the former city of Neriak. From what is left of the place, it seems he managed to do what he intended.