1-up
From Styleguide
1-up
An item that gives a character an extra life. Origin: Super Mario Bros.’ 1-up mushroom.
In general, only use 1-up if the game specifically refers to an item by that name. Use the specific item name or extra life in all other cases.
Do not use 1-up as a generic term for a power-up.
Try to avoid sentence constructions that start with “1-up.” If you have to, use “One-up” to begin a sentence.
1UP is also the name of a Ziff Davis Media game portal site: The user reviews on 1UP range from the sublime to the silly.
In some multiplayer games, the first character is referred to 1UP above the character’s status bar (also 2UP, 3UP, etc.) Use player one, player two, etc. instead unless explicitly referring to the status bar.
Example: There is a 1-up mushroom about halfway through the first level of Super Mario Bros.
Wrong: 1 up, 1up, 1 Up, one up.
