Is this how it feels to be a cyborg - making choices between, strength, stealth, intelligence to add to your arsenal of capabilities depending on what you can afford?
Shoot everything (you'll need some practice because it's the only way to deal with those tiresome end-level bosses) or concentrate on hacking and cracking to gain admittance to secrets and locations. There's also the brute force approach - overcoming your targets by sheer physical prowess and learning to punch your way through walls. Any and all actions earn you upgrade credits.
As you see, there are many ways to solve the quest and you can mix and match. If you want 'to get a head start, buy one of the 'loaded versions of the game that start you off with a variety of upgrades already 'installed' in you.