OWER, ENLIGHTENMENT, SENSATION… AND CHANGE. You can't romance an NPC unless you share their deepest desire – one of Power/Enlightenment/Sensation/Change. Power, Enlightenment and Sensation Desire are existing routes to game victory, and Change – the bone-deep inexplicable desire to change yourself – is the new route to ascension for the Dancer DLC.
So I went through our existing NPCs and assigned a relevant desire to each one, and jiggled the assignments until everything made sense and was reasonably balanced. And then I wrote the romances. And then I realised that, hey, I'd just put 25% of our NPC romances behind a DLC paywall. I didn't even realise until that late, because I had all the Dancer content there in my workspace.
So I dithered about this for a while. Would people object? would people go hunting for the romances and get frustrated when Leo or Clovette was unromanceable? If I put a note in the game saying BUY DLC TO ROMANCE THIS CHARACTER, would that be worse or better?
In the end, what made the decision again was simplicity. The romances were in the game; they worked; a few of them failed gracefully if someone didn't have the Dancer DLC; and the Dancer DLC, as above, was probably too cheap anyway.