Grind

To grind in a game refers to completing a lot of content, or repeatedly playing through a repetitive task.

The term has a generally negative connotation, and is often used to refer to boring content that must be completed in order to advance a character or move to the next area. It's not always meant that way, and grinding can refer to a lot of time played and enjoyed.

The long time Diablo and RPG fans who founded Grinding Gear Games, makers of Path of Exile chose their company name for that connotation.

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