Not all games have background wallpaper

[nikkiradloff]

• [ ] /tournaments/league-of-legends

• [ ] /tournaments/overwatch

• [ ] /tournaments/super-smash-bros

• [ ] /tournaments/dota-2

• [ ] /tournaments/rocket-league

• [ ] /tournaments/doom

• [ ] /tournaments/heroes-of-the-storm

• [ ] /tournaments/hearthstone