Mass Effect 2 gameplay thread

[Krusader]

I think that if you do all the side missions and the story missions, then by the end of the game you have almost all the upgrades, without having to buy any......AFAIK the ones at the shops are freely available during some missions too, and some at the end of the missions.
But then again, there are so many upgrades that I might well be wrong.

Spoiler Alert, click show to read: 

AFAIK, you can find three damage upgrades for each weapon throughout the game and buy two from shops (total of five damage upgrades, each upgrade adding +10% damage). Then you have two other upgrades that "unlock" when you have upgraded certain amount).
This page lists where you can find weapons, equipment and upgrades in the game and what they cost in credits & resources