Gwil's "UK education" overview doesn't apply for us in Scotland, we have it slightly differently.
You begin with primary school, which you have for 7 years. After this
you go on to secondary school (high school), in which you have 2
generic years, then 2 years studying for 8 standard grades (scottish
equivelant of GCSE's, some are chosen and some are optional), followed
by another 2 years studying for normally 8-10 highers (scottish
equivelant of A-levels, all self-chosen) or advanced highers. You can
leave high school straight after gaining your standard grades, though
most people choose to stay on for highers as they are what you need to
get into uni. College is normally for more practical course such as
mechanics, catering, etc... though many people go to college to gain
more highers after finishing high school. It is often a stepping stone
for people to get into uni after not getting the requirements they
needed from school.
KingNic, the requirements are 4 highers at AABB, including maths and
one other from computing, physics, and possibly a few others. I think
for A-levels its ABB, though I could well be wrong since it wasn't
relevant to me and so didn't matter. You can probably find more details
on their website...
http://www.abertay.ac.uk
However, I wouldn't get your hopes up that its an ideal course for you.
If you plan on doing 3D modelling and level design, this course isn't
perfect. It was kind of what I went into it hoping for, but found out
its far more programming orientated. If you want to chat about the
course any more then gimme a shout on MSN (address is in my profile).