Its clear from current events that Hamas can give Israel a bloody nose; it can fire thousands of missiles and send in fighters to kill lots of people. That is a notable achievement given their situation. But despite this it seems very unlikely that Hamas can force a capitulation on anything important: Israel out-guns and outnumbers them, and the political response in Israel will be to enforce an even harder line rather than seek a negotiated settlement.

Given this, what is Hamas' game plan? How do they expect this action to improve their situation?

I've read this question, but I'm interested in the current mass attack rather than Hamas' position on violent resistance in general.