Overwatch releases sandbox mode before League of Legends, less than 1 year after its release.
The patch notes read:
New Feature: Server Browser
Starting today, every player can create their own, unique Overwatch experience and share it with their friends, their teammates, or the entire world. Introducing the Server Browser.
An extension of Overwatch's Custom Game mode, the Server Browser allows you to adjust the settings on various maps, modes, and heroes, creating your own tailor-made server. If, for example, you want to increase Pharah’s missile speed or remove the cooldown from McCree's Combat Roll, the power is yours. Once you're happy with your settings and you're ready to launch your game, you'll need to set up the permissions. You can limit the number of people who can join your game by toggling the "Friends Only" or "Invite Only" options, but if you want to put your strange creation to the real test, set your server to "Public" and click the launch button.
Meanwhile, more than 6 years after its request, League of Legends finally releases 'practice mode', a game mode where players are able to individually test various gameplay mechanics against lifeless, immobile dummies, something which Overwatch has too supported in the 'Practice Range' since the day of its release.
