Characters start as heroes and their power level is not supposed to change a lot during the fairly long campaign.

The base rate of gain is about 1-3(2-4) points/session. Get 1pt/2 hours of play, but in begining two points go to a special store that you can use to buy things like bionics, special powers, training and similar increases. In part 3 and onward only one point goes to the store.

If you buy bionics or other ways of getting more points, your active points go to negative and you only get 1 point/session to spend on things, all other points go to buying off the debt. In case of bionics it is often also good to buy a suitable nuisance effect that you can then freely buy off later. This represents that most people take a bit of time to adjust to new bionics(typically 1-2 months for minor bionics and upti 6 months for majors).