Download the highly compressed repack to test the game. If you like it (and you find the co-op fun), buy it on sale. Then copy your repack save file to the Steam folder—it usually works.
Resident Evil 6 is a commercial product owned by Capcom. The only fully legal way to obtain a compressed version is if you own the original game and compress it yourself. Most “highly compressed” versions online are . Resident Evil 6 Pc GameFULL-highly Compressed
The entire story can be played with a friend, making it one of the best co-op experiences in the series [5.8, 5.9]. Mercenaries Mode: Download the highly compressed repack to test the game