Find the zoo's riddle. Make a smart choice. Your decisions will guide your choice on your ending.
Your first job as a zookeeper involves keeping a zoo open late evening. After infection, some animals have evolved mutants. You will save yourself as well as those.
As a zdookeeper, you engage with the creatures, feed them, replenish and clean their habitat, and tend to their needs.
Help the animals there is a dilemma compromising them. You may, however, save them. One finds the cause; a vaccination can be developed; the infection can be healed.
Would you desire to save any particular animals? A choice matters. Are you likely to survive? Your decisions lead to a range of ends.