If you do not follow @open_ctf, you missed the theme for the game this year:
posted 6-may-2015:
Imagine a world where the Betamax case was decided in favor of Universal. OpenCTF: DRMageddon - coming this summer to a @_defcon_ near you.
posted 6-may-2015:
Imagine a world where the Betamax case was decided in favor of Universal. OpenCTF: DRMageddon - coming this summer to a @_defcon_ near you.