Install (インストール Insutōru) is a keyword ability that was introduced in Booster 33: Code:Dreamworld - Hopelight "Frontier". It is associated with the "Transformant".
This ability is activated when the card with this ability appear on Square, and allow the player to remove another Z/X with "Transformant" in its card name from their Trash in order to have that card gains one of the startup ability of the removed Z/X until end of turn.
The current reminder text of Install ability is shown below:
For the list of all cards with Install ability, see Category:Install.