Yes, finally, Microsoft and 343 Industries have revealed the first footage ever of the PC version of Halo: Reach. Halo: Reach belongs to the Halo: The Master Chief Collection. The video is the gameplay from a demo that will be shown in the upcoming E3 2019.
Halo: The Master Chief Collection includes 67campaign missions in addition to more than 120 multiplayer maps (with the original Halo Combat Evolved maps in it) along with Spartan Ops maps. The collection covers six Halo games with Halo: Reach is the first game to come out followed by Halo: Combat Evolved Anniversary, Halo 2: Anniversary, Halo 3, the Halo 3: ODST Campaign and Halo 4.
The Halo series previously only had 2 games released for PC which were Halo and Halo 2. And that was from 10 years ago, so this is wonderful news for Halo fans who only have a PC. This move is definitely a good one from Microsoft and they are releasing it through Steam instead of keeping it in Microsoft Store.
If you are among the people who join Microsoft's Halo Insider program, you will get the privilege to play first. But if you are not you can check out this live stream of community director Brian Jarrard to experience one of Reach's mission. Apart from the gameplay, the developer also talked about how they made the game control feel familiar to PC users. All the PC exclusive functions like button-mapping, the FOV slider, higher resolutions, and the new progression system were also mentioned.
You can sign up for the Halo Insider program to have a chance to try out the beta tests. The tests normally will start out with a small number of people and gradually expand overtime to get feedback and insights from players before rolling it out.
The demo of Halo: The Master Chief Collection in E3 2019 will allow people to try out the Tip of The Spear mission from Halo: Reach.
The beta test of Halo: Reach will be released sometime around E3. Also, the game isn't supporting mods or split-screen at the moment, but they will add those features in the future if the fans want to.