The Black Watchmen is an Alternate Reality Game. Which basically means that you will need to make real life researches to be able to progress in the game.
The Black Watchmen is a global organization that offer a wide range of skills and services for covert missions all around the world, on behalf of any group, corporation or government that can afford them. Often called in as a last resort, The Black Watchmen pride themselves on their discretion, strength and efficiency.
So you as an agent, are never informed of the identity of the client. So the rest is your mission.
The game requires to create an account. Personally, I suggest you to have another mail to use for this game. The purpose of creating an account is to be able to do some of the missions which require mailing with NPCs.
Also in the agreement it says OPTIONALLY you can share your phone number later in the game. It's for live events, which they make during active seasons. Live event is an event that happens in real life. There have been 19 live events in cities around the world, with players taking recon photos, recovering dead drops, intercepting coded television broadcasts and performing magic rituals. They are not making live events in this game anymore though, you can check Nite Team 4, their latest game.
This game has 2 seasons and 4 dlcs. Also there are other games in extended universe, such as Ahnayro and Nite Team 4. The first season includes 25 missions in 6 parts. Second season includes 30 missions in 7 parts. (Second season is also a dlc). Mother Russia dlc includes 5 missions in 2 parts. Alone in the Dark Web dlc includes 8 missions in one part.