For a limited time only, you can stack XP with the String Theory Ops! This is a new repeatable Bonus Op that any Einstein can handle: simply pull off as many consecutive victories as you can and you'll reap stackable XP rewards, as well as an exclusive String Theory Medal when you've completed all stages. You can earn up to x5 XP as long as you keep up your winning streak!

String Theory Chained Ops String Theory I String Theory II String Theory III String Theory IV Goals Rewards Restrictions String Theory I Goals Win 2 battles in a row. Rewards x2 XP Restrictions Available to Tier V-X vehicles in Multiplayer battles only. String Theory II Goals Win your third battle in a row. Rewards x3 XP Restrictions Must complete String Theory I.

Available to Tier V-X vehicles in Multiplayer battles only. String Theory III Goals Win your fourth battle in a row. Rewards x4 XP Restrictions Must complete String Theory II.

Available to Tier V-X vehicles in Multiplayer battles only. String Theory IV Goals Win your fifth battle in a row. Rewards x5 XP

String Theory Medal

Restrictions Must complete String Theory III.

Available to Tier V-X vehicles in Multiplayer battles only.

If you don't already own the Glory IS-5, the String Theory Ops can help you to secure a discount on this mighty Soviet Heavy Tank through a different special Op! Earn 40,000 XP in any number of battles before November 27 to secure a massive 40% discount on the Glory IS-5!