I mean, you're now an "adult," do whatever you want, but since you asked:
I just question:
a) 18-year olds getting tats
b) Computer company tats
d) Video game tats
The common thread in all of those is none of them will exist or hold the same importance when you are in your thirties. And yes, that includes you. Thirty-year old dcardenas will want to slap 18-year old dcardenas around, believe me.
I'll admit, the closest I came was when I was 19, but what would I have gotten at the time? Using the same basic criteria, a Heath logo surrounded by Pong. OK, that's kinda silly, but you get the idea. This stuff is what your world revolves around (or so you think) now. It's gonna change a lot in two years, much less twenty.
Removal or alteration is more painful and less pleasant to look at as the original. And you will want them removed or altered, that is a 100% guarantee. Assuming of course, you grow beyond the point of an 18-year old whose live revolves around those items (you will, trust me, sooner or later).
At the very least, why not try for something smaller & less obtrusive to start? That way, it is less of a drastic change later, or can be expanded on more creatively if you want.
Oh, and Happy Birthday!