Dead Space Extraction Hints

You cannot see how many weapon upgrades are left/you missed in a chapter except by completing the chapter again.

Write it down so you know what levels to replay to upgrade your weapons further.

I haven't found all of them, (and I'm replaying every chapter to see which ones I missed) but I think if you do find all of them, you will have fully upgraded all your weapons by the end of the game.

When you reload, the crosshair has a progress bar that encircles it starting at the bottom and going clockwise. Did you notice that there is a gray rectangle that looks a lot like a stasis ammo slot on the left or upper left side, but it is the only rectangle

If you are using the zapper/pistol/whatever:
Shake the Nunchuck to begin reload
Pull the trigger (attempt to fire) when the progress bar is in the gray rectangle

If you use other control setups:
Press your reload button to begin reloading
Press the reload button again when the progress bar is in the gray rectangle

Each weapon seems to have a slightly different size rectangle in a slightly different position, so get to know the weapon you're using.