Editing Key and lock

A '''key''' is an [[item]] that Chip can use to open a '''lock''' (or '''door''') of the same color. Each key can only be used to open one lock after which it disappears, with two exceptions: the green key as [[Chip]] and the yellow key as [[Melinda]] in [[Chip's Challenge 2]] can be used an infinite number of times.

== Locks ==
{{Infobox Tile
|name = Lock
|image cc1 = [[File:Blue lock.png]] [[File:Red lock.png]] [[File:Green lock.png]] [[File:Yellow lock.png]] 
|image cc2 = [[Image:Blue lock (CC2).png]] [[Image:Red lock (CC2).png]] [[Image:Green lock (CC2).png]] [[Image:Yellow lock (CC2).png]]
|cc1 = Yes
|cc2 = Yes
|cc1index  = 22 ''(B)''<br>23 ''(R)''<br>24 ''(G)''<br>25 ''(Y)''
|multidirectional = No
|moves = No
}}

A lock on top of a [[clone machine]] will refuse to open even if Chip has the required key, as with all other tiles on top of a clone machine. If a block is on top of a lock and Chip pushes on the block without the correct key, the block is [[flick]]ed just as with any other [[acting wall]] under it. If the key is in Chip's possession, the block is pushed just as if it were a normal block with nothing underneath it.

An interesting behavior is when a [[transparent]] tile is located on top of a lock. While Chip cannot step on it without the proper key, stepping on the lock itself does ''not'' use the key. In the case when Chip is killed from stepping on a [[monster]] in this manner, the lock will disappear although the key was never used. (Since a lock is not transparent, the [[Transparency Glitch]] does not occur here.) However, Chip is unable to step on another Chip on top of a lock, just as if it was a normal non-moving Chip tile.

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== Keys ==
Per the Microsoft [[ruleset]], the key is a [[transparent]] [[acting floor]] tile, and [[monster]]s will not "collect" the key. In [[Lynx ruleset|Lynx]] and CC2, however, keys work differently: the blue key is erased by monsters and [[block]]s, and the yellow and green keys are monster-[[acting wall]]s. In all rulesets, a lock remains an [[acting wall]] as long as [[Chip]] or [[Melinda]] does not have a [[key]] of the same color; if Chip has a key of the same color, the lock will then be [[acting dirt]].

Note that more than one key of the same color may be collected, which can then be used to open that number of locks. In the Microsoft edition black and white mode, keys will have 1-4 dots to the right of them instead of using colors.

In [[Chip's Challenge 2]] and pedantic [[Lynx]], each player character can hold up to 255 keys of each colour; picking up a 256th key resets that colour's inventory back to 0. [[Tile World]]'s emulation of the Lynx ruleset, and the [[MS]] ruleset, do not have this restriction.

In Chip's Challenge 1, there is no way for the player to know how many keys of a certain colour they have, other than manually keeping count. In Chip's Challenge 2, if the player has between 2 and 9 keys, the appropriate number will be displayed in the inventory. If the player has 10 keys or more, a + sign is displayed instead; if the player has 128 keys or more, no symbol is displayed.

=== Blue key ===
{{Infobox Tile
|name = Blue key
|cc1 = Yes
|cc2 = Yes
|cc1index  = 100
|multidirectional = No
|moves = No
}}

The '''blue key''' is [[Transparency|transparent]] on the Microsoft ruleset, and can be picked up only by [[Chip]] or [[Melinda]], who can use it to open one [[blue lock]]. In the [[Lynx ruleset|Lynx]] version, in addition to Chip, [[block]]s and [[monster]]s will erase blue keys after stepping on their tile. In [[Chip's Challenge 2|CC2]], the same holds true, but [[ice block]]s and [[directional block]]s do not erase blue keys, and monsters erasing blue keys are treated as collecting them, thus becoming unable to pass [[no sign]]s with blue keys on them.

If a dirt block collects blue keys and [[Transmogrifier|transmogrifies]] into an ice block, it can then open some amount of blue locks depending on how many blue keys it collected.

The blue key and lock is represented by one dot in the Microsoft Black and White edition.

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=== Red key ===
{{Infobox Tile
|name = Red key
|cc1 = Yes
|cc2 = Yes
|cc1index  = 101
|multidirectional = No
|moves = No
}}

The '''red key''' is [[Transparency|transparent]] on the Microsoft ruleset, and can only be picked up only by [[Chip]] or [[Melinda]], who then can use it to open one red lock. It is the only key in the [[Lynx ruleset|Lynx]] version to act the same as its MS counterpart.

In [[Chip's Challenge 2]], Chip, Melinda, and their mirror counterparts are the only entities that can pick up red keys. All other entities will pass right over it, including ghosts and rovers who can normally collect anything.

The red key and lock is represented by two dots in the Microsoft Black and White edition.

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=== Green key ===
{{Infobox Tile
|name = Green key
|cc1 = Yes
|cc2 = Yes
|cc1index  = 102
|multidirectional = No
|moves = No
}}

The '''green key''' is [[Transparency|transparent]] on the Microsoft ruleset, and can be picked up only by [[Chip]] or [[Melinda]]. In all versions of the game, Chip can use it to open any number of green locks, while Melinda in CC2 can only use it to open one green lock. In the [[Lynx ruleset|Lynx]] version, the green key acts as a [[wall]] to other [[object]]s.

The green key and lock is represented by three dots in the Microsoft Black and White edition.

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=== Yellow key ===
{{Infobox Tile
|name = Yellow key
|cc1 = Yes
|cc2 = Yes
|cc1index  = 103
|multidirectional = No
|moves = No
}}

The '''yellow key''' is [[Transparency|transparent]] on the Microsoft ruleset, and can be picked up only by [[Chip]] or [[Melinda]]. In all versions of the game, Chip can use it to open one yellow lock, while Melinda in CC2 can only use the yellow key to open any number of yellow locks.

The yellow key and lock is represented by four dots in the Microsoft Black and White edition.

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== See also ==
* [[Transparency Glitch]]