uhum…that would be Fortnite these days 
and Epic technically takes more like 10 percent not 5% :)…
They pull the plug before all other net income into your company, percentages and taxation this is an important note to take into consideration for newcomers, they should be aware of and read in the agreements.
In other words say you sold your game for 100$
Steam takes 30% from 100$
Taxes ex. 20% from 70$…
You are left with 50$ net profit from the game sold.
Epic takes 5% from 100$ and not from the 50$
Which will leave you roughly with 45$ as net income and not 47.5$
An important distinction.