Are there any video games where you can get prize money other than Fortnite?
Yes
Almost every popular multiplayer game has tournaments where you can also win money. The only difference is the prize money - some white extreme.
Others that come to mind spontaneously:
Starcraft, Cs: go, R6 Siege, Warcraft (also wow), Dota, League of Legends, Overwatch, Rocket League, Pubg, Heroes of Newerth and countless others.