These days we know exactly what to expect from a sequel, for better or worse. But it wasn’t always so cut and dry, and developers went a little mad.
What separates an adventure from a mere mission? Metroid and its ilk are all about exploring alien worlds and unlocking their secrets, so let’s dig around and figure out how that works. It’s all about the dissemination of appropriate tools and designing environments that know how to preserve their modesty.