Final answer:
In Overwatch, players need 20,000 XP to level up from level 1 to level 2, with an increase of 500 XP per level until level 22, after which every level requires a flat rate of 20,000 XP.
Step-by-step explanation:
To level up in Overwatch, players need to accumulate experience points, commonly referred to as XP. Initially, it takes 20,000 XP to level up from level 1 to level 2, and for the following levels up to 22, the XP required to level increases by 500 per level. However, after reaching level 22, each level up requires a flat rate of 20,000 XP. Gaining XP can be achieved through various in-game activities such as completing matches, winning games, earning medals, and playing consecutive matches.