Last screenshot says that a water gun is effective against zombies (lol?) so there are at least zombies in the game. Other screenshots detail how the night is very creepy and all, so it fits the tone. Might be other monsters out there as well though.
Edit: My French is better then I thought. French review claims it takes influences from amongst others Fallout, Resident evil, 28 days later, the Call of Cthulu PnP game and Mad Max 2. World's post apocalyptic and populated by hordes of undead... things. Players are located in small villages enveloped by a dessert only know as the Outside World. (one of the screenshots details an area littered by craters that the players have just explored). While fortifying the village and fending off the regular undead attacks is part of the game, you'll quickly run out of vital resources if you don't go exploring in the outside world. While you'll eventually be overrun the point of the game is to survive as long as possible. The last survivor of a village gets the title of hero for a certain amount of time, which gives you some bonuses for your coming adventures. The status of hero can also be bought for real money (that's where they presumably get the cash to keep things running). (I'll stop here because the rest is getting too garbled for me to grasp)