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Priced at $3.99, the pack is the result of a test level the developers used to experiment with different weapons and AI during (the quite good ) Metro: Last Light's creation. Now, you'll be able to try out every weapon –– including a new one the developer will detail next week –– and pit AI against each other in the shooting range.The content will also include a "substantial solo mission," according to the company's blog , in which the player is tasked with escaping a spider-infested missile silo."The Spider's Lair is pure survival, Metro style," the company writes. "It combines all of our limited resource mechanics to pile pressure on the player. You'll be frantically wiping gore from your cracked mask, and hunting for spare filters as your oxygen tank ticks relentlessly down."The "Chronicles Pack" is the final DLC for Metro: Last Light, and will "tie up some unanswered questions" from the game's storyline.

Mike Mahardy is a freelance writer for various outlets, and wishes more games would combine shooting and survival horror mechanics. You can follow Mike on Twitter.