Rarity

Rarity is a numerical value which determines the spawn rate of various objects, mainly weapons.

Function
Rarity is handeled differently in both games.

Superfighters Deluxe
Rarity is determined by a simple algebraic formula:

$$V/(W*N)$$

Where:
 * V = The numerical value of one weapon's rarity, or the desired weapon imparticular.
 * W = Number of weapons in this spesific group, when there are crate drops. For example, a secondary weapon crate drops, since are 6 secondary weapons, so therefore the value for W is 6. Random crates make this value 1.
 * N = Numerical value for all the weapon rarity values in the group (This includes the value stated in V as well). Random crates make this value consist of every weapon in game.

If you multiply the resulting equation, you should get the precent rarity of any weapon, and its chance to drop from the spesific crate it can be found in.

Values
The following numbers are usually associated with the standard rarity value as found in game. 0: Never 1-8: Very Rare 9-15: Rare 16-24: Uncommon 25+: Common