Single and multi-player
Difficulty DOES affect achievements
1 missable achievements (plus 18 unknown)
Sign in with Steam or Xbox to track your progress, and:
Completely cover yourself in dirt
You can get this right at the beginning of the game by jumping into the pizza box next to you when you start and moving around until you get really dirty.
Obtain a Popo Chipcard
Does Drekel have a shower?
In the Wum Garden, find Drekel the shop owner and talk to him to confront him about stealing your TV. Then shoot him with your Gumgumgun.
Complete the game
Buy all gumgumgun upgrades at Betty's gumgum shop
Personalize your gumgumgun's colours
in Betty's shop, buy a colour pack and combine it with your Gumgumgun in the machine next to her.
Make an unlikely friend
Upgrade all weapons in the game to their full potential
Hijack and vandalize a Popo City tram
Use the practice mode to fight the fish
Find and watch all filmstrips
Find and defeat all bosses
Exterminate 800 kneft
Beat the game on hard mode or higher
Defeat Stoplight in All Boss Mode without getting hit
Complete your first Boss Run
Achieve maximum happiness
Beat the game on insane mode
Defeat the Dustboss by using the Breft2000 suit during All Boss mode
Buy Tein Taatseb's helmet during All Boss mode
Help Raab start his blarb smoothie business
Beat All Boss Run mode under 25 minutes
Complete the Boss Run without items from Tein or Raab's stores