[Home](./index.md) > [bitburner](./bitburner.md) > [Singularity](./bitburner.singularity.md) > [joinFaction](./bitburner.singularity.joinfaction.md) ## Singularity.joinFaction() method If you are not in BitNode-4, then you must have Level 2 of Source-File 4 in order to use this function and the RAM cost is doubled. This function will automatically accept an invitation from a faction and join it. Signature: ```typescript joinFaction(faction: FactionName): boolean; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | faction | [FactionName](./bitburner.factionname.md) | Name of faction to join. | Returns: boolean True if player joined the faction, and false otherwise. ## Remarks Singularity - Level 2