Tokyo Jungle

Tokyo Jungle (トーキョー ジャングル, Tōkyō Janguru) is a survival action game developed by Crispy's! and published by Sony Computer Entertainment for the PlayStation 3. The game takes place in a deserted, futuristic Tokyo, in which the city has transformed into a vicious wildlife wasteland.

Tokyo Jungle was released in Japan on June 7, 2012, available on both disc and downloadable versions. The international release of the game became available for download via PSN in North America and the PAL region on September 25 and September 26, 2012, respectively. It was included on the "Best of PlayStation Network Vol. 1" compilation disc, released June 18, 2013.

= WORLD =

History
In the year 2027, signs of agitation on animal life became more and more apparent: pets which were normally docile towards Humans start to become feral in nature again and attacking people, and Zoo Animals start behaving very aggressively, causing numerous attacks and even deaths of zoo staff. By may of that year, over 500 cases of stray pet attacks and deaths had been reported. By September, sightings of prehistoric Theropods started to be reported throughout Tokyo, and an attack presumably caused by the same creature was given shortly thereafter. It is revealed that Humans in the year 2215 had developed time travel capabilities (testing time travel on prehistoric animals sending them to year 2027), and have sent messages to their own species back in 2027 to evacuate. The main plan was to push their ancestors to 2215, so Humans in 2215 can live in 2027, thus dooming the 2027 population so the 2215 race can live comfortably. In this process, mankind has gone extinct because of this, leaving Tokyo completely overrun by the local animals.

In act 14 of the game, the "true ending" is that Mankind is unable to return to 2027 thanks to the actions of a Robot dog AI named ERC-003. Due to this, Humans presumably become extinct completely, leaving the world ruled by the animals that remain.

Geography
It is entirely unknown as to the state of the rest of the world, though it can be assumed much of it is similar to the main setting of Tokyo. The state of Tokyo Jungle is still fairly modernized with large, albeit abandoned, cities. Many of the structures left behind by Humanity remain standing, though many buildings are currently rotting away and crumbling, various foreign flora growing and connecting building by vine bridges.

As it is a city, toxicity is a common threat to what life remained in Tokyo, with various "toxic smog" weather occasionally sweeping through various areas of the city.

= Flora = Many, if not all of the plants are foreign to Tokyo, possibly growing and expanding from Zoos and animal shelters after mankind disappeared. They are the main food source to local herbivores of the region. The main sources of food include Flowers, Crabgrass, Mushrooms, and Fruits, all of which are remotely edible to all known herbivores.

= Fauna = Once Mankind had completely vanished from Tokyo, numerous animals are able to escape and live freely away from man. Unlike most animals of modern day, the fauna of Tokyo Jungle had become surprisingly intelligent and had created, in a way, their own civilization amongst the ruins of Tokyo. Herbivores and Carnivores still share a predator-prey relationship though, given their natural instincts still highly evident but they had been shown to exhibit more sapient-like behavior; wearing human accessories such as helmets and armor for extra protection, living in alliances and hierarchies with other species of similar nature, and so on.

Curiously, all Herbivores and Carnivores, regardless of species, seem to survive efficiently off similar foods: a large Hippo can sustain itself after eating a few flowers for example.

Thanks to the actions of mankind and time travel, numerous prehistoric animals also live alongside modern animals, many of which are much stronger and more versatile; Ice Age animals such as Mammoths and Smilodon, to pre-KPG animals such as Dilophosaurus and Pteranodon. It's unclear if these animals share the same mentality as modern animals, as they aren't shown in any form of social structure outside of their instinctual urges.

External Link
Tokyo Jungle Wiki