There are 2 ways of recruiting Survivors.

1. Rescue Survivor in Danger zones during exploration
On occasion, there will be a call for rescue during exploration with the sign 'HELP'. Select and clear the area to rescue the Survivor.

Upon rescue success, you will be given a chance to 'recruit' or 'deny' the Survivor.

2. Search Survivors
In the top right corner of the game lobby screen, there is a 'Survivor Search "button in green.

Press the button to see several Survivors found. Recruit one of the Survivors in exchange for the Bottle Caps.

Higher-tiered Survivors will require more Bottle Caps, although some may require S-Bullets instead.

Survivor search can be performed free once a day. S-Bullets can be spent for additional searches.