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Lost city icon
Lost City
Double gate icon Trap gfx

Survival: Lost City (zs_lostcity) is the first chapter of Zombie Scenario: Season 1 in Counter-Strike Online.


The spawn base is set on the center of the map. The players must survive from the incoming zombies from four different directions. 5 rounds with 3 minutes time limit for each round.

Official description[]

It has been a month since a research group was out of contact after being sent to the city that had been isolated due to Rex Virus infection. The government dispatched special forces for investigation and they saw countless zombies in all over the city. When they were just about to report to headquarters, communication with the outside world were cut off and zombies attacked them. The surviving humans from the attacks are now preparing for the final battle.


  1. The advance team encounters a zombie in the Lost City. There were so many zombies that even escaping was not easy. The remaining members of the advance unit fight the zombies by making a simple defensive wall, but it is not enough to defeat the zombies.
  2. CF. Lost City was a small town in North America. Many factories and facilities were built due to industrialization, but many factories could not withstand the sudden recession and closed their doors. With its sparsely populated and adequate infrastructure, the Lost City was a suitable place for Dr. Rex to continue his research.
  3. CF. Erica is rescued by David Black, who later joined the rescue team. In particular, Erica is famous as the sole survivor of Lost City, where David Black has a gut feeling that Erica doesn't think she was able to survive simply because she was lucky and she has something special. Erica follows David Black to join the AFC mercenary group.


  • Survive for as long as possible. Game only ends once either the players finished all rounds or all of them died.
  • Click the B Key to purchase a weapon/equipment.
  • Dead players will respawn in the next round or when using the Battle Revival item, however it can only be used before the last 30 seconds of the current round.


Honor mission[]

Mission Briefing Task
A medal given to players who have cleared Lost City for 400 times
[City Hunter]
Gentleman, do you remember the day when the zombies made a city to be a perfect death ruin? The city soldiers who were against the zombies till the end have been forgotten now but, you need to continue their honor. (Easy stage is not included) Clear Survival: Lost City 400 times.



  • The map overview shows this map is shaped like an inverted cross.
  • There is huge sign saying "LOST CITY" in this map.
  • There is a censored Coca-Cola promotional sign in this map.
  • There are 5 characters in total on two posters which appears on Lost City. They are Ritsuka, Gerard, David Black, Yuri and Choi Ji Yoon.
  • There was a bug where zombies can not reach the players if they stand below the red and white striped awning on the map. This bug was fixed in Re:boot update.
    • Also, in the first round of easy difficulty, the player that wears Kevlar suit will not receive any damage from zombies. This bug was also fixed Re:boot update.
  • In Re:boot update, Throw-type zombies are featured in three ways which are: Regular Zombie, Light Zombie and Heavy Zombie. Nevertheless, this is the only map which include the last two.
  • Before Re:boot update, this map has 20 rounds for easy and hard difficulty and 50 rounds for normal difficulty.
    • After Re:boot update, the number of rounds were increased to 50 for all difficulty levels.
    • After the 4 December 2014 update of South Korea, it was reduced to 20 for game balance purpose.
    • After the 26 March 2015 update of South Korea, it was reduced to 5. But instead, the completion required to get the medal was changed from 100 to 400 times.