This is a quest (mission!) given to you by King Ignatius named "The most Epic Quest for EXP". You need to do a whole bunch of random quests which culminate in you deploying traps to defend your position against attacking goblins (ODd) and then some Fizzco Bots.
I deployed one trap by each bridge and threw some deployed weapons out like the acid sprinkler and turret copters. You'll need at least one 'heavy weapon' to take down some of the larger enemies. Especially the "Warlock" who is just a bad-ass Fizzco Bot.
But it's pretty easy. At the end you hear that welcoming "bloop" :)