You usually need to be invited or get specific access permissions. Maybe it's through a personal invitation or a special code given by the creator of the story.
One way is to make the story sound really exciting and unique. Explain why it'll be a valuable experience for them to join. Maybe offer some incentives or rewards too.
Well, you need to create relatable characters and an engaging plot. Make the story have multiple entry points so that readers can imagine themselves as part of it easily.
The story of Helldivers 2 likely involves intense battles and a fight for survival in a hostile universe. It probably has elements of strategic combat, exploration, and cooperation among players to overcome various threats.
In Helldivers 2, the story centers around a team of brave divers who are sent on dangerous missions in a universe overrun by aliens. There's a lot of strategic planning and teamwork involved as they strive to protect their home planet. The plot is rich with unexpected turns and intense battles.