All 4 in one pack? Please!!

[SHODANFreeman]

Is it just me, or is that calculation quite strange?

Well, the games normally are $24.98 together, the current price for both outside the package is $17.48 due to Black Plague Gold being on sale but not Overture, and the package price is $19.99, and is 50% off, which is $10, hence $9.99. It is written in a somewhat confusing manner on that page though.