Rat Master
(inspired by the Rat quest in the wiki)
Basically breeding of rats by giving them plants or corpse as food
Requirments - at least 2 rats (don't differentiate with male/female coz it's too complex, or ..it depends), plant or corpse
PC places 2 rats in ground.. If in an enclosed area rat moves around. If not, Rats run and escape and breeding fails.
PC places corpse or plant in the same enclosed location as the rats
Leave the Rats and return after X number of Day&Night cycle. Reality must be benta bit here.
Capture the Rats. They don't fight back.
some are bully rats that hurt other rats but require little food. some rats eat more and multiply fast but easily bullied by other rats. PC must manage time and number and types of rats for a successful harvest.
a possible quest would be: Town asks PC to give them rat meat, but all rooms are occupied with NPCs that dislike/kill rats. They say it's another form of cannibalism. Another quest: there are no plants to feed the rats, PC must find a human body. dead or alive does it matter?
Story wise rats act as metaphor for the survivors of the island. They squabble over each other whenever they can.