GTA impact: Rockstar Games 'cancelled' Zombie game and spy thriller 'Agent' rockstar games gta 6, grand theft auto, grand theft auto agent, grand theft auto zombie, zombie game, gta zombie, zombie game, gta 6 rockstar games, gta, GTA V, gta VI, rockstar, rickstar games, gta vice city, gta VI trailer, gta VI release, gta VI release date, gta VI price, Obbe Vermeij, Obbe Vermeij blog, game, video game, video game news, ps3