: Stock up on tank/killing machine grenades and turrets before level 30; they turn "red" and sell for significantly more money at that level. Key Unlocks by Level Feature Unlocked Why it matters Early Zombie Pods Best for farming free crates/strongboxes. 15 Live Online Events Access to Faction Wars and seasonal championships. 35 Nightmare Mode The best place to find high-tier "Red" and "Black" gear. Syncing Across Devices

Only use your best augments on Red or Black tier weapons. 4. Join an Active Clan

The SAS 4 free account offers a generous set of benefits, including:

Complete these every day to earn free Credits and Strongboxes.