I'm Irish, but not in the game making business. I'm not aware of any major game development studios in here, most software companies in general seem to use Ireland more as a convenient tax beachhead than a place to actually make things. There does seem to be a smattering of smaller studios.
That said, I am vaguely aware of several courses in game design that have sprung up in some of the third level institutes here - I know this because they sprung up after I entered college on a more general course! I can't personally vouch for/against them, but if you like living here for whatever reason, there certainly are options to study here. I don't know how highly such game specific courses are thought of (regardless of where you study), I'd definitely recommend researching that.
For reference, I believe that "standard" 4 year university degree here are typically FETAC level 8, so a level 6 would probably not be considered on par with this.
They dont make their own games but certainly without Demonware there is a certain FPS franchise that probably wouldnt be as succesful as it is. They are probably the largest company in the gaming industry in Ireland, that develop anyway. We have a number of support centres here.
In terms of the course, Im in UL doing the games development course there and its quite good. Certainly gives me a good grounding and the work experience program is very useful. Carlow has a good course too. Also Queens university belfast has some really good courses. I know this from meeting the guys at events like Games Fleadh. There are others too but those would be the ones Im most familiar with.