Marksman

Marksman is the level following Excavation and being followed by Descent, requiring 7 runes to unlock. It serves as the official introduction to the Zombie Sniper and reintroduces the Fiend Pro.

Secrets

 * 1) At the green door, run up the yellow stairs and use the extra height to jump onto a nearby ledge with a hole. Reward: 2 Large Rocket Ammo
 * 2) At the first checkpoint, look for a small ledge nearby. Reward: 2 Small Health
 * 3) Shortly before the second checkpoint, run along the red fence to a hidden cave. Reward: Large Health
 * 4) After killing the Snipers, shoot a target to unlock some hidden stashes. Reward: 2 Small Health and 2 Small Armor
 * 5) On your way back to the starting green door, a second smaller green door blocks your way. Before entering it, jump on a yellow crate nearby to find a hidden cave. Reward: Minigun
 * 6) A green shield requires the green key to activate. Remember to go back to it. Reward: Large Chaos Ammo

Secret Exit: Near the level start, a small indent on the cliff face can be seen. Jump down there to find the hidden exit to Ammo Cache.