This seemed like the proper place to ask mod-related questions, so hopefully someone could help me out. I'm fairly new to using mods, but I've been browsing the site for quite a bit and I've seen a bunch that I'm interested in. My question is this: What affect does installing mods have on the main game? For instance, things like earning achievements, or future DLC. I'm only on my 2nd playthrough of New Vegas at the moment and I wasn't sure how much mods had an effect on the achievement system, or considering we are due for a DLC release soon, if they would effect any future game additions. Also, considering it's impossible to play the game after the end of the main story unlike Fallout 3 (post Broken Steel), am I better off just waiting until I've fully used up New Vegas before installing any mods to it. If so, would I be better off searching the Fallout 3 Nexus for Fallout 3 mods to expand that game since I am capable of playing after the main story is long complete. As I said, I'm fairly new to mods, but I've seen a lot of great work and I'm eager to expand my game experience. I just don't want to ruin my current games as well. Thanks in advance for any tips/advice.