Callisto Protocol is a survival horror game, so you’ll be scavenging for ammo and supplies throughout the campaign. What you might not expect, however, is that some of their weapons can be completely missed if you’re not thorough in your exploration. This means you could only finish the game with two pistols and one melee weapon, but that shouldn’t be a problem as we have the locations of all story and optional weapons below.
Stun Baton
The Sn Batton is automatically obtained during the Outbreak chapter and will be your melee weapon for the rest of the game. You’ll get it after a room with two giant fans and a bunch of enemies. Just crawl up the shaft nearby and you’ll get the weapon during a short scene.
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hand cannon
The hand cannon is automatically obtained during the Outbreak chapter and is the first ranged weapon you will have access to. At the end of the mission, you’ll enter a room where Elias will throw part of a gun at you. Take it to nearby Reforgge and buy the hand cannon to advance the story.
Be sure to thoroughly explore the areas to use ammo on all of these weapons as well.
Skunk Gun
The Skunk Gun is made in Reforge using the Skunk Gun schematic, found in the Aftermath chapter. A bit into the chapter, you will have to find the exit of a basement. You’ll be in an area known as Basement D3 and you’ll come across a fuse box that can’t be used yet. Continue forward along the mostly linear path until you reach an area where you’ll need to take out some enemies and find a fuse on the ground. While your first thought would be to use this to open the nearby door, you should return it to the fuse box you saw earlier. Use it there to open a door, then crawl through the ventilation shaft here to find the Skunk Gun Schematic in the next room.
Riot gun
The riot gun is automatically obtained during the lost chapter. After making your way through a variety of outdoor snowy locations and some indoor corridors, you’ll eventually stumble upon a room where you’ll find Dani fighting a bunch of enemies. Help her clean them up, then open the door to trigger a cutscene where she hands you this high-impact shotgun.
Tactical pistol
The Tactical Pistol is made in Reforge using the Tactical Pistol schematic, found in the next chapter. Halfway through the chapter, you’ll enter a room where three blind enemies will enter and converge from the left, right, and in front of you. Take them out quietly and go through the door ahead, following the path until you have to jump over some metal debris. At the entrance to this next room there will be another enemy that will come out of the wall. Once you’ve killed him, you can find the Tactical Pistol schematic sitting on a desk on the right side of the area.
The tactical pistol has a high rate of fire and some decent damage.
Assault rifle
The Assault Rifle is made in Refrigeration using the Assault Rifle blueprint, found in the Colony chapter. As you explore the slums at the end of the chapter for a security key, you’ll come to a point where you’ll need to climb a ladder attached to one of the dilapidated houses on the ground floor to reach the upper section. When you get to the top, go behind you to a bathroom and pick up the Assault Rifle schematic in the sink, and watch out for the enemy that bursts out to attack you right after.
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