RO2 How can I bypass Steam, when I bought the disc version

I live in a rural area and I have satellite internet. I only get 15GBs a month. Then $10/1GB after, so you can see why I cannot use STEAM. I bought the game fromm Amazon and I have the disc but the install wants Steam and wants to download 10GBs!



How can I bypass STEAM and just install from the disks. STEAM is of no help, the told me to get lost and ask Tripwire.