<prompt> Hlobo luni lwelayisense lomthombo ovulekile wevidiyo yomdlalo wevidiyo we-roguelike okhishwe ngo-2012, lapho isethi engaphansi kwemodeli yayo yamanani ibizwa ngokuthi i-free-to-play, enelayisense ngaphansi?  <response>: I-GNU GPLv3 