The DLC features a “substantial” solo mission called Spider’s Lair, in which the player is armed only with a lighter and a compass while stuck inside a missile silo infested with mutant arachnids. The mission introduces a new weapon, the hand-pumped flamethrower.
The other is the Test level, which basically a massive abstract level ”where new gameplay features, AI behaviour, art and tech changes could be quickly and easily demonstrated outside the narrative constraints of a campaign level.
And at the centre of the Test level was the Gun Table, where every weapon in every possible configuration could be found and tested empirically for rate of fire, recoil, damage etc. against a row of endlessly re-spawning bullet fodder that lined the far wall.
The Test Level was never intended for the final game, but we sometimes used it as a curiosity to show the gaming media and realised it could be a lot of fun to experiment with.”
Deep Silver also teased the DLC coming after, the Chronicles Pack. “This final DLC most closely resembles the Metro campaign experience as you take controls of Pavel, Anna, and Khan and Ulman as we tie up some unanswered questions away from Artyom’s quest,” states the blog.