"Halo 3" is the big one: the next installment of the Master Chief Collection and the PC multiplayer that many Halo fans have been waiting for. It should be released in the next few months, but if you sign up for the Halo Insider program today, you can play in the beta test sooner.

While most "Halo" PC betas ("flights") are limited to a certain number of players, 343 is now opening its doors. Community coordinator Tyler "Postams" Davis posted on Twitter on Thursday that anyone participating in the Insider program will receive an invite on Friday:

However, if you don't act fast, you may miss the opportunity. Once you have created an Insider account, please check your email and opt-in to ensure you are contacted. Davis' tweet specifies Friday morning.

The current Halo 3 flight ends June 26, so if you join today, you'll get a week of free multiplayer.

Thanks, ResetEra