Pikipedia:Spoiler

In fear of ruining the ending/key part of the game for the player (before he/she has experienced it him/herself), an article or section may be marked for spoilers in the hope that the section can be avoided.

In order to do this, use the following code:

{{spoiler}}
 BODY
 {{endspoiler}}

or this:

NOTE: the following method does not currently work. Please refrain from using it until the template is fixed.

{{spoiler section
 |title=TITLE
 |body=BODY}}