Welcome to my guide for the locations of schema and weapon upgrades.
I made this guide as I couldn't find a list for this anywhere else

Schema and Upgrades show in a different styled chest to the normal loot and only start appearing after you unlock crafting as part of the story

First 4 Schema are unmissable, you get them from Earl in the Scrapyard (Grenade, Throwing Knife, First Aid, Oil Barrel)

Water Schema is located on the beach

In the tent where the boss fight against Tarnstrom takes place are the chests for
Molotov Schema

Magipistol Scope

In the area to the left of the Greenspring signpost
Gravgun Lock-on

In the area to the right, by the houses
Bomb Schema

Upstairs in the Inn
Remedy Schema

Upstairs - Last room on the bottom left
Vitamins Schema

Ground floor - 2nd room on the bottom right
Magirifle scope

Basement - unlocks after beating the boss in the mines - In the room to the left
Magipistol Ammo Plus

Basement - In the room below the chest with the Magipistol Upgrade
Magirifle Lance

In the first zone, just after the first mandatory fight
Lasdart Scope

In the second zone, instead of going through the door to the next area head down and across the tracks over the water
Zap Grenade Schema

At the end of the first zone where the cutscene with General Cherk takes place, head up
Gravgun Extender

Once you reach the bridge to the Military Checkpoint, head south instead of crossing it
Insta-Taser Schema

By the entrance to Silvington Base, instead of going up to the base head left
Lasgun Charge coil

F2 from the left Elevator - just follow the path
Medicine Schema

B1 - hidden under one of the walkways in the room with the conveyor belts
Bio Bomb Schema

After the checkpoint opens, go up the first set of stairs and then head up
Smoke Bomb Schema

In the room where you activate the Generator
Lasdart Silencer

In the area entered from the outside - follow the main path, it’s in the big room
Magipistol Stabilizer

In the Offices area, on the left of the room just up from the exit to the outside area
Gravgun Laser aim

Just after you get off the lift, on the right side before going across the bridge
Magirifle stock

In the Abandoned Bunker at the end of the first zone- B1 all the way to the right
Magipistol Capacitor

In the Abandoned Bunker in zone 2, on the right side - Floor B1 on the far right
Gravgun Lmt Remover

In the second zone, on the left just before the next screen
Rocket Schema

In the third zone, just keep following the path
Magirifle Back

In the Abandoned bunker in zone 3 - B1 just before the boss fight
Lasdart Laser-aim

First Zone - follow the path until you get to a patch of water and then head up
Magipistol Reserve

Zone three, just before going down the stairs to the boss there is an exit to the outside, the chest is outside on the right
Magirifle Ammo Slot

Just after leaving the pass, instead of going to the Capitol, head down
Lasdart Support

Next to Guy’s Gunnery
Gravgun Extra power

In the room with 4 beds you wake up in as part of the story
Revive Schema

At the end of the sewer keep going up instead of heading right to the next area
Pod Schema

Once you get to the Capitol and get the message about backtracking, head to the scrapyard and talk to Earl, he’ll ask you to grab 3 megascrap. These spawn in random locations but a sound will play when you enter an area with one. The possible spawns are:

Hogtowne
Scrapyard
Hogtowne Checkpoint - in one of the tents
Greenspring
Monastery
Greenspring to Silvington base - in the first zone
Military Checkpoint
Kovel Foothills

There may be more locations, these are just ones I’ve seen and ones other people have mentioned

After collecting all 3 head back to Earl and he will give you the upgrade


Once you have gotten the boat in the sewers, instead of heading up go through the exit on the left. In this area go down to the bottom and there will be a computer that lets you unlock the Hogtowne Checkpoint bunker.

Head back to the checkpoint and head inside for a boss fight, after which you get access to a room full of goodies and the upgrade


Once you get to the Capitol and get the message about backtracking, head back to Silvington base and a Scientist will give you a key.

Head back to where you fought General Cherk and use it to open the locked door. There will be a boss fight in this area and after you will receive the upgrade


Nothing special is required for this; the last upgrade for the Lasdart is in the Biodome spaceship - Forest. It’s in the 3rd structure in the zone, the one on the left side.

In the 2nd zone of the Vast Future offices there are 2 interactable PCs, the bottom one has the option to unlock the Kovel Bunker

The Kovel bunker is located just below the entrance to Kovel foothills

Fight your way through the bunker and the chest containing the Nuke Schema is right at the end