Short Answer 
Grounded does not support split-screen multiplayer, requiring each player to have their own gaming system and copy of the game for local play. However, it does offer online co-op gameplay, allowing players to collaborate with friends remotely.
1. No Split-Screen Support
As of early 2023, Grounded does not offer split-screen gameplay. This means players cannot share a single screen while playing together, which some games allow for a more local cooperative experience.
2. Separate Systems Required
For multiplayer gaming in Grounded, each player must have their own gaming system as well as a copy of the game. This creates a barrier for local play, as friends cannot join the game without individual setups. Therefore, ensure you have these before planning a multiplayer session:
- Each player needs a separate gaming system.
- All players must own a copy of Grounded.
3. Online Co-Op Mode Available
Despite the lack of split-screen, Grounded does provide an option for online co-op gameplay. This allows you to team up with friends from different locations, making it accessible if you want to collaborate on survival strategies together.