Screw what people say, with all those "Not Recommended" comments.
This is, to be honest, one of my first reviews... And, it actually kinda saddens me that this game is getting so much hate.
Yes, The Fifth Day is incomplete. It's obvious. But, it's not bad... Actually, I find myself loving it when I find another person to play it with, as Multiplayer makes the Death Game so much more fun.
Simple, you start out with nothing (Sadly), and work your way around the map, avoiding hunters and other dangers while keeping your power up, until you can find a Hacking Tool, a harvester, and a construction tool. Then, you multi-task exploring for ammo, weapons, weapon parts, etc. and managing your base, its power, its defenses, and the supplies your harvester(s) collect.
Yes, it's obscenely hard in single player, especially when you have nothing to work with... But that's the point.
It's not supposed to be a solo experience.
It's supposed to be either a team of people, working together to make a base, and survive who knows what, or a fight for your life as you hunt for supplies, watch out for hostile players, and hope that there are still harvesters around to claim so you can survive on your own.
Please, if you're thinking of getting the game... Get it. Support the game devs, expand the community, and wait who knows how long for an update. (Yes, it's updating... But think how hard it is to make this kind of massive game, with all those A.I. trying to hunt you down and destroy you. Along with managing the hacking gimmick... yes, you can hack everything except for other players. It takes a hellish amount of time to master, but if you can get hacking something to make it friendly before it kills you down, then you stand a chance for experimentation.)