Keys are not sold in any shop, they must be found, or in the case of the skeleton keys, crafted.
For more information on containers, which may bear locks of various types, see [[Containers]].
=== Mechanical keys ===
'''Mechanical keys ''' are completely small, metallic. Each key is objects cut in a particular pattern and is meant to match only one type of lock. There are ten thousand key pattern types, serial numbered 0000 used to 9999; as such, a lock can normally only be opened by a key if their serial numbers matchoperate mechanical locks.
(wip)There are ten thousand key pattern types, serial numbered 0000 to 9999; as such, a mechanical lock can normally only be opened by a key if their serial numbers match.
=== Keycards ===
(wip)'''Keycards''' are flat, thin pieces of plastic resembling a credit card, and containing a microchip with a hard-coded electronic signature. When read by an electronic lock, the electronic lock compares the keycard's signature with its own; if they match, it unlocks. Otherwise, it doesn't work. There are exactly 65 535 different signatures, serial numbered using the hexadecimal system, from 0000 to FFFF. Much like regular mechanical keys, electronic locks can only be opened by a keycard with a matching serial number.
=== Skeleton keys ===
A '''skeleton key''' (wipor a '''master key''')is an informal name for a mechanical key that opens more than one lock. There are ten different types of skeleton keys, from Type 0 to Type 9. Each skeleton key can open 1000 different mechanical locks, and the type number indicates which range of keys it will open; for example, a Type 7 skeleton key can open every mechanical lock with serial numbers 7000 to 7999. Skeleton keys can be [[Crafting|crafted]], and occasionally they can even be found, but they have an important caveat; once inserted into a lock, that lock will be jammed and the key won't be removed (if one attempts to force the skeleton key out, it usually bends or breaks). This means that skeleton keys are '''one-use only'''. There exists no direct equivalent of the skeleton key for electronic locks; instead, they must be [[Lockpicking|picked]] using dedicated objects called [[Crafting items|hacking tools]].
== Lighter ==
(wip)A '''lighter''' is a small device used to create a small flame, so that it can be used as a suitable source of fire for a variety of items, from [[Meds|cigarettes]] to [[molotov cocktail|Molotov cocktails]]. Lighters in the Mazes are usually made out of aluminium, with a folding cap, reminiscent of the Zippo design in real life. Lighters function as an alternative to safety matches; one fuel unit is equivalent to one match. A brand new lighter contains 300 fuel units. They are non-refillable, and are discarded when empty. Lighters have a Weight of 1, and can be found for sale at workshops for [[File:Parallar symbol.png|10px]]'''25''' each, in the same aisle as [[Crafting items#Ingredient items|ingredient items]] for crafting.