Items
There are several types of items which you can pick up. Some can be purchased in the store while others can be found in lockers, green containers, or just lying around. After killing a Necromorph, stomp on the corpse to get an item from them. These items can be divided into different categories.
Ammo
Pulse Rifle
Plasma Cutter
Ripper
Each weapon requires its own unique type of ammo. While you can buy ammo at the store, it can be expensive. If you search Necromorph corpses, you will usually find enough ammo to keep you going. The types of ammo you often find depend on the weapons you are carrying. Therefore, if you want to use a weapon but don't have a lot of ammo for it, carry it with you and ammo will be found as you progress.
Refill Packs
Small Med Pack
Medium Med Pack
Large Med Pack
Stasis Pack
In addition to ammo, you will need to look for refill packs. These can be found all over just like ammo. Carry these in your inventory. Then you can use them to either restore your health or to recharge your stasis module. Once you have found the schematics for these, you can purchase them at the store. The med packs refill different amounts of health while the stasis module will completely recharge your stasis module.
Power Nodes
Power node
Power nodes can be found in blue circuit boxes as well as lying around the Sprawl. Collect and keep these. When using a workbench, you use power nodes to upgrade your weapons and equipment. At the workbench, a schematic will be shown for the selected weapon or piece of equipment. You can then place power nodes into slots to get specific types of upgrades. Schematics always have one, two, or three initial slots. You must then place power nodes into adjacent slots along the path. Some slots are upgrades while others are empty. However, you must use power nodes in empty slots to maintain continuity along the schematic paths. Once placed, power nodes cannot be removed until you get the respec ability. Then it costs 5,000 credits to remove all power nodes from a single weapon or piece of equipment. Therefore, think carefully before upgrading. Power nodes also are used to unlock storage rooms where you can often find valuable items. For this reason, it is always a good idea to keep a power node on you at all times.
Credits and Semiconductors
Credits
Semiconductor
Throughout the Sprawl, you can find credits. Dead Necromorphs even give them up. Credits are the currency you use at the stores for purchasing weapons, suits, and items. Search carefully so you can find all the credits possible.
You can also find semiconductors. These are tougher to acquire and are usually only in locked storage rooms, which you need a power node to unlock. Some large Necromorphs, such as Brutes, Tripods, and Guardians, will give up a semiconductor when they die. Semiconductors have only one purpose—to be sold for credits at the store. Gold semiconductors are worth 3,000 credits, ruby semiconductors are 10,000 credits, and diamond semiconductors are a whopping 25,000 credits.
Schematics
Schematic
Schematics are another type of collectible item. You really want to search for these. Once you find one, it stays in your inventory until you reach a store. Then you automatically upload it into the store. From that point on, you can then purchase the item from the schematic at any store in the Sprawl. Schematics are how you gain access to new weapons and suits as well as ammo and other items you need.
Logs
Log
People on the Sprawl left behind audio and text logs. Pick them up as you find them and either listen to a conversation or recorded audio message or view some digital text. These logs are collectible and help enrich the storyline of the game. While they can't be sold or used, they are definitely worth the search.