Punch or lure a Clacker into the sewer. Make sure that they actually go down the hole. Then, scare the Clakker by beating them up. They will run into the door where Scuz lives. Listen carefully to hear Scuz say something about eating chicken.
Capturing Fatty McBoomboom alive
First, capture all of his companions. When he is the only one remaining, run to stand underneath his platform. Load the Zapfly and go back and forth while shooting at him with it. This will bring his stamina down. When he is unconscious, quickly run fast to him (up the slope) and capture him.
Defeating Elboze Freely
Stand on the air chutes so you keep bouncing up and down. Have the Zappfly equipped. Whenever Elboze tries to attack you, he will not be able to because he cannot go through the air chute. Whenever he gets close and you are up above, shoot the Zappfly to his tender spot on the back. You can wear down his energy until he is knocked out.
Equip Fuzzles (or Rabid Fuzzles) and Thudslugs. When he spots you, start to back up and do not stop. Peg him with as many Fuzzles as you can, then let rip with Thudslugs. Every so often Elboze will hit you, but you can heal yourself while your Fuzzles are keeping him busy. When you run out of Fuzzles, switch to Boombats. Elboze should be almost dead by now. Alternate between Thudslugs and Boombats (fire one Boombat, then a Thudslug). If you run out of either of them, Stingbees work fine. If done correctly, you should defeat him in under one minute. Note: Never stop walking backward unless you are low on health and Elboze is preoccupied with a Fuzzle onslaught.
Defeating Secto
In order to defeat Secto, you must go through two of his spider pets. Shoot them with Sting Bees and Bombats. If they get too close, hit them with Riot Slugs until they disappear and run away. If they catch you in their whirlwind attack, just aim and shoot until they run away. After you defeat them, you must fight Secto. When fighting him, hide behind the big rocks until he shoots you with his giant laser. After the rock breaks, shoot one of the two power generators at the bottom of him. They have blinking lights on them. Shoot them until one of the blinking lights gets broken off, then run and find another rock to hide behind. You must do this about ten times. If you need more ammunition, there is plenty around. Just wait until after he breaks your rock, get some, then hide again. After you destroy all of the blinking lights on his power generators, he will die.
Shoot the big cylinder objects on the generators. If you stand next to the left or right of them, you cannot get hurt.
Defeating the second Gloktogi
To defeat the second Gloktogi (the octopus-like robot) you meet, before you meet the final two, jump upon the crates until you land upon the container wall. In the distance in front of you, you will see a glass door. Shoot it and walk slowly towards it. Do not fall off the container. If you do, this you will draw out the Gloktogi. Let it web you a few times to draw it directly in front of you, then step back until you land on the crates. You will be able to look over the rim and fire at will. The monster cannot reach you. Use the Zapfly. This will save ammunition, but it will take a while.
Mongrel Valley: Black Market store
Enter New Yolk City and talk to one of the townsfolk. Climb the rope that you are told about and jump to the nearby ledge. Follow the ledge all the way around the buildings until you reach a set of swinging doors. Enter it to access a hidden Black Market store, where you can buy upgrades to your weapons and attributes.
Note: In order to get into the black market, you need a password. Just walk around town until you hear someone mentioning the Black Market. Talk to them and they should tell you the password.
Steam achievements
Complete the following tasks to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", then "My profile", then "View all my games", then the game and view stats.