Shooters have changed a lot over the years. Not too long ago “shooter” brought to mind games like Doom and Castle Wolfenstein, which had you picking up huge armories of weapons, scouring maps for power-ups, and relied on circle strafing and maze like hallways.

It’s quite different from today's modern day shooters and their ADS systems and destructible cover mechanics.

Here are the 10 technological innovations that made the shooter genre what it is today.

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