I attempted a side-by-side comparison with the DT lyrics above, but the version from Behan himself has significant differences that can't be compared side-by side, so I was unhappy with the results.
These are the lyrics from Dominic Behan's book, Ireland Sings, published in 1973 by Music Sales Corporation, New York (Song #68)

PATRIOT GAME
(Dominic Behan)

Come all you young rebels, and list while I sing,
For love of one's land is a terrible thing.
It banishes fear with the speed of a flame,
And makes us all part of the Patriot Game.

My name is O'Hanlon, and I'm just gone sixteen.
My home is in Monaghan, there I was weaned
I learned all my life cruel England to blame,
And so I'm a part of the patriot game.

It's barely a year since I wandered away
With the local battalion of the bold I.R.A.,
I read of our heroes and wanted the same
To play up my part in the Patriot Game.

They told me how Connolly was shot in his a chair,
His wounds from the fighting all bloody bleeding and bare.
His fine body twisted, all battered and lame
They soon made me part of the patriot game.

This Ireland of mine has forlong been half free.
Six Counties are under John Bull's Monarchy.
But still De Valera is greatly to blame
For shirking his part in the Patriot Game.

I don't mind a bit if I shoot down police
They are lackeys for war never guardians of peace,
But at deserters I'm never let aim
The rebels who sold out the Patriot Game.

And now as I lie here, my body all holes
I think of those traitors who bargained and sold
I'm sorry my rifle has not done the same
For those Quislings who sold out the Patriot Game.

Note from Joe Offer: I got a personal message last week from a Mudcatter who called me "arrogant" for posting lyrics to a Vin Garbutt song about the Irish Troubles. He said the situation was very tense right now, and it was not a good time to post provocative songs. So, today I got a phone request for lyrics to "Patriot Game," and I realized that our lyrics in the DT were not the same as what I found in the Dominic Behan book. I'm posting the corrected lyrics, and I hope the Mudcatter will not be offended. My job here is to ensure that lyrics posted at Mudcat are correct and source-documented. I make no judgment as to the appropriateness of the lyrics. I don't think that it is correct or worthwhile scholarship allows me to make value judgments on the lyrics that are posted. My only criteria are correctness and attribution. I really don't have time to screw around with all that other shit.
-Joe Offer-