I may quote myself...to heaten the funny nsfw debate :P
there are also butler versions with gui....multiple ones.....its a well hidden secret but i was invited to the club of dead poets by a good developer friend, who is literllay a developer-knewledge "jungbrunnen" he helped multiple times with honest feedback and hidden insights. he wrote a whole space simulator in blitz (?) engine, its shocking :D --> beyond.frontiers by Duality Beyond Studios (support him, he is one of the few indie-develoeprs, who has pulled it through all by himself, while suffering form authism, he may truely dserver your support (not looking at the obscene digital-pimp scene also known as nsfw true artist with love for your very money, in fastest possible way :P (i dont mean all nsfw creators, but as of the latest happenings, these knuckleheads crawling out of their holes and rage about their steady money income suddenly vanished :P much luck rebelling but these laws are set by the individual states of europe and most certainly in the us and other places too and what do careful owners of the last true indie holding grounds, that is available to yall for free, but you keep coming. when will you get it that most certainly itch had to do this because they also have bills to pay and im sure they wouldnt be happy at law suit rolling over. these laws have been stated and already been approved by multiple high ranking politicans of countries that have something to say obviously.....its even darker then nsfw dissapearing if you would really dive to the reason hidden in plain sight.