Missing an upgrade? Let's figure out what it is and where to find it. Refer to the stage walkthrough pages for more details on finding each upgrade. Each Maverick stage holds either one sub tank or one upgrade capsule.
Heart Tanks increase the capacity of your health meter. There's one Heart Tank hidden in each of the Maverick stages, for a total of eight. Once you have six, your health meter will be about the same size as the weapon meter, so all eight will make it a bit larger than that.
There are four Sub Tanks to be found. When you collect a health pickup when your health meter is full, it's stored in a Sub Tank for later use. These are very handy as they effectively quintuple your maximum health. Here's where to find them: