Boom Goes the Doonamite!

Objectives
Speak to Rivett east of Grookin Hill. Use his Methane Grenades to fend off the Jinyu attack.
 * Jinyu Attackers Slain (15)

Description
It's an emergency!

Looks like you stirred up a hornet's nest killin' all them fish-folk.

They're conductin' a full-on counterattack on Grookin Hill!

I was hopin' to get some R&D time, but we're gunna hafta put my methane-grenade theory to work right away!

Meet me on the east side of the fort, and bring yer throwin' arm!

Rewards
You will also receive:

Progress
I think these methane-grenades are gunna impact the environment, if ya know what I mean.