This is difficult to accomplish without cheats because the two big cannons are next to impossible solo. What you need to do is buy 8 piercing shells from Pobre Obre and fire them at the beginning of the fight. There's a slight chance the big cannon won't be able to act afterwards, or at least only act, like, one turn out of 10. If he doesn't you're screwed, try again.
#2threetimesPosted 1/13/2012 3:46:11 AM
Getting past the 2 cannons on your own is the mind-blowing achievement. --- "As for threetimes, yep, she is a badass mofo faq maker." - ignasia7
#3TuxedoFenrir(Topic Creator)Posted 1/15/2012 2:23:28 AM
Getting past the mutant crocodile in the sewers was worse, seriously.
I got him with Concentrated Methyl, one of the prizes from the Devil's Tower's vending machines. Then I went and beat Mr Muscle with it too. (I couldn't do it before, the main character is really underpowered on foot)