A lil somethin somethin: You can find the details for this event on the announcement page here.

Get ready to fight for what's left of humanity in the M.U.T.E. Protocol 3 Event, only available until July 31! Defeat opponents, climb through weapon tiers, and make your way to the Comm Tower's Brain!
Exclusive game mode: Arms Race!

5v5, Best of 3, respawn enabled, one objective: destroying the Brain's case.
Every round, you start with a basic weapon and switch to a new one after eliminating an opponent or when picking up an upgrade. Upon reaching the last weapon tier, you unlock the mythical Golden Hammer to destroy the Brain's Case. However, be careful, you’ll lose a weapon tier every time you get eliminated!
A limited-time bundle for free... Read more