From Destinypedia, the Destiny wiki
The Guardian Games was a limited time Event in Destiny 2 where the three Guardian Classes (Titan, Warlock, and Hunter) competed to get the most points from April 21 to May 11. Eva Levante returned as the vendor for the Guardian Games.
Despite the current situation, Zavala decides to set up a colourful event of friendly competition in the form of the titular Guardian Games in an attempt to help alleviate the stress of these circumstances and keep morale steady.
After speaking with Eva and Zavala, Guardians will compete with each other not only to win prizes, such as new items, gear and weapons, but for the bragging rights to see which class of Guardian is the greatest, superior, and/or most favoured.
Each Guardian will receive a class item to adorn while taking part in competition. Bronze, silver, and gold medals will be available to earn daily, each of which will focus on specific game modes. To earn medals, equip your new class item, pick up laurels on the battlefield from defeating enemies with supers or abilities, and advance your quest for the medals you desire. At the end of the event, your daily placements will be combined for a final score. Depending on your team’s standings, your class items will be locked to their respective placements for the remainder of the year.
Zavala gazes toward the podium as you approach. "The Guardian Games were hard fought, but ultimately the Titans took the gold with shield and hammer." He's unable to hide the glint of pride in his eyes. "This is a victory for every Guardian. Titans may be on top right now, but the Warlocks and Hunters will work hard to make sure we won't stay there. That strengthens us all."
"Now if you'll excuse me, I need to prepare." The smile fades from Zavala's face. "Lord Shaxx is eager to celebrate our win in the 'traditional Titan way'."