I managed to fix it. Here's what was wrong. I use nvidia drivers, so I needed the nvidia-glx-ia32 package to get this working. I had already tried this and it just segfaulted so I assumed I was doing it wrong. What I really needed was not only nvidia-glx-ia32, but also libc6-i386 to get the 32-bit nvidia-glx to work correctly (I only figured this out because the packages.debian.org page had that library marked as "related", and not a dependency nor even a suggestion... weird). Everything is working flawlessly now :). Thanks for the help!
