Figured I'd post some pictures of what we have so far. Sorry my pictures are so big, even when I edit them to be smaller on Photobucket they still show up huge on the forum.
My bouquet. Looks pretty wasteland-esque, I think.
Favor boxes and bottle caps
Decorations for the buffet table. It's kind of a 50's/Fallout theme as we're telling our non-gaming guests that it's 50's themed because they won't get the Fallout reference. We're going to have 50's style food like pinwheel sandwiches, deviled eggs, and ambrosia salad.
And this isn't video game themed, but this is my version of a guest book. We're going to Disneyland for our honeymoon. The guests sign the balloons. I thought this would be better than an actual book because we can hang it on the wall instead of just throwing a guest book in the closet. I still need to add the balloon strings and our names/date.
Our centerpieces will be mason jars filled about a quarter of the way with bullet casings, then some kind of flowers. I'm trying to get some used casing from my friends who hunt, but I might have to buy new ones from the local sporting goods store.