Sandbox game with nighttime PvP mechanics.
Nightmare is out on Steam as of this publishing, and you might be asking yourself; “what is Nightmare?” Outside of a game clearly trying to write its own headlines, Nightmare bills itself as a “revolutionary open world MMORPG with night-time PvP mechanics.” What are night-time PvP mechanics? Probably something to do with fighting other players at night.
Check out the Steam page for the blah blah blah skivvy on the game’s story, and then click that download button. It’s free to play after all.