Red Dead Redemption and its Undead Nightmare and Liars & Cheats add-ons (both disc-based and downloads) should be nipped in the bud today, Rockstar reports. Upon booting up the game, users will be prompted with a mandatory download, that resolves issues including the inability to unlock certain Achievements or Trophies, and a glitch in which players would get stuck in the environment, especially when sitting down at specific Liar's Dice chairs. It's quite a large list of fixes, so hit up the link below for the full list.
Of course, this update won't correct the behavior of all the vicious, murderous wildlife in the game. We're afraid that's a problem you (and your trusty six-shooter) will have to resolve on your own.