The Developer Pack is a DLC pack that was billed as giving 'creative players some interesting tools with which to explore the Metro', prior to its release. The main feature includes a Shooting Gallery, a Metro Museum and an AI Arena, as well as a new singleplayer mission - Spider Lair - containing many Spiderbugs. The pack is included if you purchased the Season Pass, or otherwise costs $4.99/£3.99/€4.99. It was released on Steam and Xbox Live on the 17th of September, on PSN in North America on the same day, and on PSN for the rest of the world on the 18th September. The developer blog for this DLC is here.
The pack is made up of two levels, the Spider Lair mission, and the Developer Pack level, that contains the Metro Museum, the AI Arena and the Shooting Gallery. The Pack also includes two new weapons: the Bigun, a new shotgun made out of a bicycle, and the Flamethrower. The VSSK Vychlop has also been renamed as the Clapper, and the Volt Driver as the Hellbreath. The pack features all available weapons, including all DLC weapons, as well as unique attachments for the Gatling, Hellbreath and Clapper.
The Developer Pack has received mixed to positive reviews.