Horde Rush was a Battle Royale event introduced a day after the 9.21 Update on June 13, 2019. The event lasted for 6 days (June 13-June 19, 2019), and it involved a squad LTM with the return of the Cube Monsters and unique challenges to complete.
During this event, all squad lobbies with 4 members would get access to a unique LTM known as Horde Rush. This mode involves several storm circle stages with score multipliers and fragments which spawn cube monsters. Between each wave, players will have a minute to collect gear and build preparations for the next wave. If players make it to the final stage, they must fight a cube monster boss.