Bloodlust

The player wants blood. They love blood. THEY NEED BLOOD. The player is one of the infected of vampire fever, a disease that causes anyone infected to process protein in blood instead a food. The player has a blood meter. They need blood. The lower the meter, the more they crave blood and need blood. If the blood meter reaches 0, it's lights out. The player's goal is to find a cure for the virus, or die when the goverment launches their bombs on the infected city. No tips. No eternal life. You may be vampiric, but it's only one thing. Bloodlust.