The story is set in 2096 in Kyiv, Ukraine, a city that turned into the center of the Zone. The Zone was created after a strange interdimensional rift opened, leading the city and all surrounding areas to be infested with outwardly beasts and dangerous anomalies. The rift become known as the Hole. To stop the spread of the Zone, a quarantine was declared, and all the inhabitants of the place became hostages. At first, the Zone was controlled by scientists and militia, but due to monster attacks and strong aggression from the locals, the Zone soon became divided between various bandit clans led by so-called Lords. The city itself and surrounding area of the Zone became known as the Junkyard.
Rodan, the main hero of the story, is a Lord of one such clan, who is going to participate in a meeting of Lords. The meeting turns out to be a trap by Lord Mark, the leader of a clan of fanatics who worship him as a messiah. Rodan is forced to fight back with his swords, various weaponry and telekinetic powers granted by the Zone's anomalous power. He soon finds out that there is much more to worry about than just a new clan war, as he is forced to confront an enigmatic and very powerful man whose ambition threatens not only to safety of the Zone, but to the whole world outside. During his journey, Rodan also has to uncover the mystery of his past and the secret of the inter-dimensional rift, the Hole itself.
A patch was released, updating game to version 1.1. The patch fixed most of the problems with gameplay balance and bring some new effects to the game. It was highly recommended to download the patch, as it improves the game drastically.
A stand-alone expansion entitled Collapse: The Rage (Ukrainian: Колапс: Лють) was released in 2010. It continues the story of Rodan after the destruction of the Hole. The features include improved ranged and close combat mechanics, new special effects and the "Rage" mode.
The game received mixed reviews.[citation needed] Many critics[who?] praised the unusual setting, hack'n'slash mixed with shooting, and soundtrack. However, the game was highly criticised for simplicity of its combat system, repetitive gameplay and poor design of some characters.[citation needed]