如果细节是存活的关键，那它们需要有更锋利的牙齿，更迅捷的脚步。

Objectives

消灭只环境生物。

Tiers

1. 1 : 10 objectives completed
2. 5 : 100 objectives completed
3. 5 : 500 objectives completed
4. 5 : 1 000 objectives completed