When we report on graphics drivers, it’s almost always for AMD or NVIDIA. It’s Intel’s turn this time, however, with their latest 15.60 release. This version supports HDR playback on NetFlix and YouTube, and it adds Windows Mixed Reality for Intel HD 620 and higher.
I should note that this driver only supports Skylake-, Kaby Lake-, and Coffee Lake-based parts. I’m not sure whether this means that Haswell-and-earlier have been deprecated, but it looks like the latest ones that support those chips are from May.
In terms of game-specific optimizations? Intel has some to speak of. This driver focuses on The LEGO Ninjago Movie Video Game, Middle-earth: Shadow of War, Pro Evolution Soccer 2018, Call of Duty: WWII, Destiny 2, and Divinity: Original Sin 2. All of these name-drops are alongside Iris Pro, so I'm not sure how low you can go for any given title. Thankfully, many game distribution sites allow refunds for this very reason, although you still want to do a little research ahead-of-time.
That's all beside the point, though: Intel's advertising game-specific optimizations.
If you have a new Intel GPU, pick up the new drivers from Intel's website.