Well there is the Stop Killing Games initiative started by Ross Scott and supported by the Pirate Parties. If they succeed, companies selling games in recent years will be required to either keep supporting their game or to make it available in a way so that others can ensure its continued support.
When this is achieved the step to free older games is small.
If you live in Europe you have the chance to support the movement by vote in the upcoming elections.
With the German Pirate Party loosing its seat a strong voice against surveilance is lost.
They also supplied NGOs with information directly from the legislative process, allowing them to act faster (and sometimes you have to be very fast to comment on minor changes with great effect) I hope somebody else at least partly takes on this role.