Eden 4 Harem Paradise

The Great Blackout ended civilization in 2035, and by 2041 what's left of it hides underground. You wake up as Zero, the last surviving man out of a bunker's failed cryostasis batch, and your body is suddenly the only thing standing between the human race and extinction.

The setup is grim, but the "Repopulation Protocol" that follows is exactly what it sounds like: Zero has to work through the women of Eden-4 and rebuild the species one relationship at a time. Between the survival talk and the mystery of what actually happened topside, the game is mostly interested in watching that dynamic play out.

You move through the bunker reading, choosing, and steering conversations toward the women you want to get closer to, with the sci-fi backdrop giving weight to scenes that are otherwise standard visual novel courting and payoff. The 3D character models carry most of the visual work, so don't expect much beyond that framing.