Not Blizzard. A French game developer and publisher that has been defunct for many years now. But even then, I remember talking to colleagues from other studios and many used Alienbrain - primarily for art assets. We used SVN and later git/mercurial for code.

Since Alienbrain was quite popular back then, I assume they are still around now. Given that git still has no out-of-the-box facilities to handle large binaries and asset previews conveniently.