I feel like sandboxes fall into two categories, either they're super repetitive or just require constantly checking a walkthrough to know what to actually do to progress things (be it an in-game wt or a pdf) and it just... It feels pointless, I'm not here to craft a unique and personalised story...
I'll be super original and say, hmmm, NTR and sandbox
And to be extra daring I'll specify that if the MC's doing the cucking, I don't mind the NTR, I won't feel bad for a made up sap (especially with how these games rarely give the male NPCs much going on personality-wise) but I'm not being into...
Dating My Daughter really opened my eyes to the concept (before that I preferred incest focused on male MC x mother/sister) so it'll hold a special place in my corrupted heart