Nexon marked the 21st anniversary of Sudden Attack on the 6th by rolling out a commemorative update, headlined by the cooperative jump content, UP Together. This update was prepared to provide new entertainment for users in celebration of the game's 21st anniversary. On the 23rd at 5 PM, an online showcase will be held to host an event match and a birthday party.

The new cooperative jump content, UP Together, will be available until August 27th. Up to four players can form a team to navigate a path destroyed by the 'Gomdolking Virus' and reach the summit. Players must utilize platforming skills to assist teammates, overcome various obstacles, and defeat the boss. To celebrate the launch, an event will run until August 27th, offering 21st-anniversary themed items such as the TAS Gomdolking permanent weapon.

Various web events celebrating the 21st anniversary will also be held during the same period. These include a 'Medal Combination' event where players can complete items by combining 'Half Medals' with others, and a 21-day attendance challenge that provides SP and other rewards. Additionally, a 'Special Exchange' will run until September 3rd, allowing players to collect tokens to trade for shop rewards like permanent weapons, and the 'Combo Pass' will be activated on August 20th to provide additional growth rewards.

In-game events to heighten the pre-party atmosphere have also been prepared. A 'Burning Event' will run until August 20th, offering items such as the AK47(IK) Homerun (permanent), and a 'Summer PC Bang Party' event will be held where players can complete missions to earn special loot boxes. On August 6th at 8 PM, a live broadcast will be held on the official SOOP channel to introduce the update and distribute various items.