Could the homeowner not simply have her power shut off to hasten the removal of these pests? If they're game developers, they'd be dependent on electricity.
Unfortunately it seems it will only be resolved with a lengthy eviction process.
It is also interesting that there problems within the first few days.
[0] http://www.businessinsider.com/airbnb-host-cant-get-squatter...
That way, the owner isn't turning off power to constructively evict, but the power is off all the same.
See http://www.ocf.berkeley.edu/~asucrla/Harassment%20by%20Your%...