Fest Guests is an open world survival game about defending yourself against an alien invasion - right at the beginning they ruin your party by abducting all other people!
First you fight with simple weapons until you get alien technology. The battlefield is the large interactive town area - you can even fight in a robot driven city bus.
In the beginning you are hunted by aliens - at the end you chase the aliens to the last one!
In the heat of the battle
You find the city is both huge and very interactive - it is full of interiors, shops, restaurants, offices, apartments and other places to visit, hide or fight. Thousands of items to operate, pick up, eat or just throw - with a single mouse click. You can even use an ATM - however, you need no money - you are the only remaining city dweller, or perhaps the only person on Earth.
You know your hometown - they don't.
The game takes about 5 hours to play, BUT you can and probably want to spend much more time to explore the feature rich city.