Excuse me, but this is a porn game first, with a papers, please mechanic, plot is way secondary here and even it ends with a sex scene. People didn't buy it to watch waifus getting in and out, they bought it because the wanted to get in and out of waifus, which falsified their paper pass, again. If you want a plot with a progression (which is very easy in the Gatekeeper, you don't have to think about your mother-in-law survival at least) Papers, Please is much better. If Gatekeeper didn't have any adult content, nobody would have bought it.