Fallout: New Vegas Discussion
As long as you close out Vegas and Steam then restart the game, you'll get the achievements.
This is especially pertinent when it comes to mods that necessitate console commands for some reason or another.
You can use as many commands as you please and close out Vegas. But, many commands are only good for the session in which they are used, so you would not get the command effect when Vegas is restarted.. The ones you want are those that can be saved and then reloaded with Vegas from the save file. Typically, the commands that stick with saves have "setav" and "modav" in them, but not always just those examples.
The patches and DLCs have no effect on the console commands. Opening the console still disconnects the achievement tracking until you exit and restart the game.
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