Board Thread:General Discussion/@comment-26257239-20150917133941/@comment-75.95.173.188-20150917145524

You need 20 million total to get to lvl 15 which is totally doable for a non-money player within a few months. Save up your stocked fuel for forced sortie period and use then on special raids IIs or above only. Also you could save up stocked fuel and do a marathon day with contracts.

The problem is that whenever they bump up the F22 to lvl 20 it's NOT going to be realistic to get to within a few months for a free play. It will cost somewhere from 50-60 million credits just to go from lvl 15 to 20. I don't see how a free play could accumulate that many credits in less than 5 or 6 months, on top of the 2 or 3 it's going to take to get to lvl 15.