After exploring the internet, I just got more confused with these questions....
What kind of video games, science fictions, nobles, stories and music are halal in Islam?
As a general rule it should not be Haaram, as it's not mentioned as Haaram in Quran or Sunnah direcctly (unless those contains such things that are already accepted as Haaram e.g., Nudity, gambling, music, looking towards faces of non-maharrams, etc).
But another very important consideration for a Mu'min (as this question bore in your mind, that means you are aware and want to remain safe from wrath of Allah) is the pleasure of Allah.
Now ask yourself, is these games anyway help you remembering Allah, or those help in opposite way. See, we are here in this world for very short time [see Qur'an: 18:19; 23:99,113] and we should more engage in worship, rather than engaging in events that make us forget our purpose.
The Prophet (saw) advised to: "Take benefit of five before five: Your youth before your old age, your health before your sickness, your wealth before your poverty, your free time before you are preoccupied, and your life before your death" (Narrated by Ibn Abbas and reported by Al Hakim)
"Everything other than remembering Allah is (considered) wasteful play except four: a man humoring his wife, a man training his horse, a man walking between targets (learning archery), and man learning swimming" narrated by An-Nasaa'i and authenticated by Al-Albaani (Sahih Al-Jami' 4534).
So, as a thumb rule, anything that take you to confusion should be avoided, if you want to remain safe.
Al-Hasan bin 'Ali said: "I remember that the Messenger of Allah (s.a.w) said: 'Leave what makes you in doubt for what does not make you in doubt. The truth brings tranquility while falsehood sows doubt.'" [Jami` at-Tirmidhi Vol. 4, Book 11, Hadith 2518]
Based on Shia view, Music's that are used for or known as(by the same man or people who know art) vulgar are banned.
so music's that are or contain sex, nudity and stuff like that are haram. but it's okay to be in a place that this kind of music in public places or Hall's and every where you don't have control over the music being played.
and for the games, novel's same rule applies, you should not read or play game's containing sex, nudity and stuff that are considered as disrespect to religion's...
as i assume you are Sunni, i stop there and post some links for further readings: