In memory of Ireland's Martyred Dead?
Re gaming the period - difficult - there was a very short period (70-73) when there were proper firefights but the 'RA quickly worked out they were fucked if they carried on trying that.
After that it was snipers, bombs and riots. Very occasionally when they got DShKs they tried it on in the border areas but again the army had withdrawn the green army from the ground, mostly to barracks and hill top forts. On the ground it was special forces and helicopter patrols mostly, with little road movement. You could try a base takeover with digger bombs and/or home made mortars and prigs backed up by 20 or so 'volunteers' with assault rifles but there weren't many instances.
So little scope for skirmish gaming except right at the beginning, but certainly not fire at anything that moved in any event. Yes I know about Derry, but given the target rich environment, that was a really low body count for a 'free fire' mentality (there wasn't one) and there were no repetitions. To be fair to the 'RA (fuck knows why) they had their own concerns about hearts and minds and generally tried to avoid wholesale 'collateral damage'.
There are good games to be played with figures if you can assemble enough civilians, rioters and a few gunmen, and on the other side army and RUC. Snatch squads trying to take organisers/leaders without getting lured into side alleys or snipers fields of fire while stopping burning and looting. The IRA players try and provoke the RUC/Army into shooting and into areas where soldiers can be picked off in ones and twos. The IRA get points for any injuries caused by the 'crown' and for any crown forces killed/injured and any property destruction which they can blame on the Army/RUC. The Army get points for keeping as much peace as possible - no injuries, no shooting, IRA arrested. The RUC can get points for as much mayhem as possible from any source in the early phase, as they can use this to tell Westminster 'We told you so'.
You can make an intriguing strategic/operational game of planning your strategy on both sides - the move from 'open warfare', to urban guerrilla, to economic targets, to mainland is interesting to see from the 'RA's perspective if you can be bothered messing about with internal politics, PR expectations/disasters -Gerry A and Bloody Friday in Belfast although Brendan Hughes took responsibility- and you can suspend your feeling if you were ever involved in it.
You could do Castlereagh interrogation role plays using that wallpaper as cruel and inhuman treatment.