The developers added online multiplayer functionality, allowing you to join or host games directly through the Steam Community Hub or the in-game menu. 2. Using Steam Remote Play Together

Most meta-upgrades and unlocks are shared or accessible during cooperative sessions, making the "roguelite" loop rewarding for the whole group.

Only the host needs to own the game, and your friends' controllers will act as if they are plugged into your PC. 3. Third-Party Solutions (Parsec)

It combines Bullet Hell action with Tower Defense strategy.