So you want to upgrade your weapon, huh? Well, hopefully you’ve been collecting items around the game world during your journey. If not, start doing so.
Upgrading a weapon to level 4 in NieR: Automata requires a lot of materials and gold. In the case of level 4 upgrades, you’ll need some rare items, some of which require hours of grinding.
Note that many materials can be found on the ground as general loot. Also, this guide is a work in progress.
Broken Battery
- Purchased: Emil’s Shop
- Reward For: Family Squabble, Robo-Dojo – Black Belt
- Treasure: Desert Zone – Lower Subterranean
Broken Circuit
- Purchased: Emil’s Shop
- Reward For: Half-Wit Inventor, Stamp Collecting
Broken Key
- Dropped By: Small Stubby
- Purchased: Emil’s Shop
Complex Gadget
- Reward For: Gathering Keepsakes (Repeatable Using Chapter Select)
Copper Ore
- Purchased: Amusement Park Shop
Crushed Nut
- Purchased: Emil’s Shop
- Reward For: Retrieve The Confidential Intel
- Treasure: Desert Zone – Lower Subterranean
Crystal
- Purchased: Amusement Park Shop
Gold Ore
- Reward For: A Villager’s Request, Popola’s Errand
- Treasure: Desert Zone – Oasis
- Other: Found in City Ruins: Deep Cave
Dented Plate
- Dropped By: Small Stubby
- Purchased: Emil’s Shop
- Treasure: Parade Escort, Retrieve the Confidential Intel, Speed Star
Dented Socket
- Purchased: Emil’s Shop
- Reward For: Parade Escort
- Treasure: Desert Zone – Lower Subterranean
Dye
- Purchased: Amusement Park Shop
Iron Ore
- Purchased: Amusement Park Shop
Large Battery
- Dropped By: Small Stubby
- Reward For: Reconnaissance Squad
- Treasure: City Ruins – Bottom Ladder
Large Gear
- Dropped By: Small Stubby
- Treasure: City Ruins – Bottom Ladder
Machine Arm
- Dropped By: Medium Biped, Small Biped
- Reward For: Idiot Savant, The Recluse
- Other: Pascal will sell you Machine Arms after a memory sequence during Route C..
Machine Leg
- Dropped By: Medium Biped, Small Biped
- Reward For: Idiot Savant, The Recluse Stays Home
- Other: Pascal will sell you Machine Legs after a memory erase sequence.
Machine Torso
- Dropped By: Medium Biped, Small Biped
- Reward For: Idiot Savant, The Permanent Recluse
- Other: Pascal will sell you Machine Torsos after a memory erase sequence.
Memory Alloy
- Dropped By: Medium Biped, Small Biped
- Reward For: Game Dev Machine Lv 3, Lord of the Valley, Robo Dojo – Red Belt, Vanquish the Bad Bot
- Treasure: Desert Zone – Lower Subterranean
- Other: Found in City Ruins: Deep Cave
Meteorite
- Reward For: Gathering Keepsakes, Half-Wit Inventor, Popola’s Errand, Reconnaissance Squad, Storage Element
Moldavite
- Reward For: Storage Element, The Wandering Couple, Treasure Hunt At the Castle
New Bolt
- Reward For: Game Dev Machine Lv 3, Reconnaissance Squad, Speed Star
- Treasure: City Ruins – Bottom Ladder
Plant Seed
- Purchased: Amusement Park Shop
Pristine Cable
- Reward For: Game Dev Machine Lv 2, Reconnaissance Squad
- Treasure: City Ruins – Bottom Ladder
Pure Water
- Other: Looted in Sunken City (Rare)
Pyrite
- Other: Looted in Flooded City and City Ruins: Deep Cave
Rusty Bolt
- Dropped By: Small Stubby
- Purchased: Emil’s Shop
- Reward For: Game Dev Machine Lv 3, Speed Star
Rusted Clump
- Purchased: Emil’s Shop
- Reward For: Game Dev Machine Lv 1, Half-Wit Inventor, Sorting Trouble
Severed Cable
- Purchased: Emil’s Shop
- Reward For: Game Dev Machine Lv 2, Robo Dojo – Brown Belt
- Treasure: Desert Zone – Lower Subterranean
Simple Gadget
- Other: Looted in Forest Zone (Rare)
Small Gear
- Dropped By: Small Stubby
- Purchased: Emil’s Shop
- Reward For: Game Dev Machine Lv 1, Robo Dojo – White Belt
- Treasure: Desert Zone – Lower Subterranean
Stretched Coil
- Purchased: Emil’s Shop
Stripped Screw
- Purchased: Emil’s Shop
- Reward For: Robo Dojo – Red, Robo Dojo – White
- Treasure: Desert Zone – Lower Subterranean
Titanium Alloy
- Dropped By: Medium Biped
- Purchased: Emil’s Shop
- Reward For: Game Dev Machine Lv 2, Reconnaissance Squad
- Other: Found in City Ruins: Deep Cave
Tree Sap
- Purchased: Amusement Park Shop
Tree Seed
- Purchased: Amusement Park Shop
Warped Wire
- Purchased: Emil’s Shop
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