>play early game
>have makeshit backpack
>get military pack upgrade
>hear about rat deal
>get ratpack
>find new pack
>eh, ratpack is good enough
>find scientist pack BP
>eh, ratpack is good enough
>find long jump pack
>eh, I can walk/swim
>find voidpack
>eh, ratpack is good enough
>get to reactors
>realize the past 20 teirs of backpacks have been straight upgrades to the ratpack
At this point I almost feel commited to it, but c'mon... do you really *need* more?