I had many fond memories of BG2 from when I first played it many years ago, but when I replayed it a second time with various mods installed it wasn't nearly as epic or awesome as I remembered it to be.
Of course you dont feel the same when you are much older and already know it so the element of surprise doesnt work anymore. Its natural. We are accustomed to different things nowadays.
The problem has nothing to do with single player.
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ISOMETRIC camera doesnt sell nowadays - new players expect games to look like movies. They want to see heroes' faces, close-ups, detailed animations. Even some mediocre 3rd ARPGs sell more than isometric CRPGs nowadays. What do you expect when new players play games like Witcher 3, Horizon Zero Dawn or AC Origins… (and AC is going more towards ARPG)
- a lot of these CRPGs were based on strong nostalgia and
high expectations - but despite successfull KS campaigns it wasnt enough for some devs. it was probably easier for Inxile and HBS to make cyberpunk and post-apo RPGs because these are more rare and there was some audience that didnt like Fallouts from Bethesda. But fantasy PoE was compared a lot to BG and for many fans it didnt meet expectations. So they punished them by lower sales of second game. Quality!
- if you come with new IP, you need
strong PR campaign and good videos - videos from Obsidian wasnt bad but were weaker compared to Larian or Ninja Theory (Hellblade).
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dont make your core audience angry saying unneccessary things - Josh Sawyer did that mistake with some statement (about CRPG crowd or his negativity towards BG etc.. maybe there were more statements like that).
Future of Obsidian - Im afraid that Obisidian will go Bioware's way and move more and more out of RPGs. They always do more projects but it seems that none of them is big hit. Im little more optimistic towards Inxile.
Its very probable that HBS will make
next Shadowrun as 3rd person RPG. So new isometric CRPGs will be probably domain of very small European devs in the future.