Also you get special Beast Mode skills when you kill bosses in the form of injectable booster, because of some pseudoscientific mumbojumbo. The girl that rescued Crane said that you don't NEED all the boosters, only enough "to feel strong enough to take the Baron".
Maybe there's alternative endings if I use all boosters and unlock all Beast Mode skills? Or just saying I don't need to hunt every single last mini boss?
Anyway I need another one to control at will Beast Mode. Or Crane will go into RIP AND TEAR mode randomly as Beast Mode meter fills up. Which is annoying when you are just killing trash zeds.