Just how many Subject Alphas are there?

Objectives

Explored the Crucible of Eternity.

• Story Mode
• Explorable Mode—Submarine Path
• Explorable Mode—Teleporter Path
• Explorable Mode—Front Door Path

Tiers

1. 5 : 2 objectives completed
2. 5 : 3 objectives completed
3. 5 : 4 objectives completed