When you're finally able to find an animal to shoot, the kills are rewarding thanks to realistic body physics, but those moments are so few and far between that it's hard to justify the effort spent searching for them. Even if the multiplayer is tempting, odds are the overall lack of polish will be too off-putting for most gamers.
Even for $20, there is such an abundance of annoying sound, graphical, and gameplay glitches that hunting fans would be better served picking up an older game in the series or buying a better shooter and pretending their enemies are prey. Sure, the humans in Far Cry 2 might not be deer, but the environments are much more realistic, and there's no game like the most dangerous game.