Anttis Instrumentals has released 2,000 instrumental pieces for free under the Creative Commons 3.0 license for use in games, monetizable videos, and more with credit to Antti Luode. The pieces have been used in Chicken Farm 2K17, Starship Theory, Taphouse VR, and others and are available in MP3 format.

You can download 1,790 categorized instrumental pieces in one https://drive.google.com/open?id=1yCZtjPSKW3ifngIP6zzbc9spXspjatIf or all instrumental pieces at https://drive.google.com/drive/folders/0B1t5awWiDLZhMXBmT0M5Mm1nRG8