pay money, or I think you can earn it by being last man standing or something.
Both of these.
Payment:
12£ = 1 month
30£ = 3 months
48£ = 6 months
Last man standing (randomly chosen between the remaining survivors, if everyone is wiped out):
dead during the night between day 5 and 6 = 1 day (between day 5 and 6 means at midnight, during the attack after day 5)
dead during the night between day 6 and 7 = 2 days
dead during the night between day 7 and 8 = 3 days
dead during the night between day 8 and 9 = 4 days
dead during the night between day 9 and 10 = 5 days
dead during the night between day 10 and 15 = 6 days
dead during the night between day 15 and 16 = 7 days
dead during the night between day 20 and 21 or thereafter = 10 days
