Hi. In my opinion the game should not feel to lonely if you are playing singleplayer. It needs NPCs that you can meet in the world, you can get together to survive, for example you can control them by giving tasks like follow, defend, be aggresive and more. It would be much better than just traders who stand still and give quests and items. 2nd thing is making a base and operating them with NPCs. It would be great, that you can order them to go collect some stuff in the wildness or defending the base. They need to drink, eat. It's just a plan for a later alpha. Maybe It's possible to make that project come true ( The best zombie game example is State of Decay 1&2) 