Will US-Bought Games Work on Xbox in Ireland?

Yes, with caveats:

• Physical Games: Work perfectly. Xbox consoles are region-free for physical discs.
• Digital Games: May have regional restrictions:
  • DLC might be region-locked (unavailable in Ireland).
  • Online play might be limited to US servers.
  • Language options may not include your preferred language.
  • Prices displayed in USD, not EUR.

Recommendation

Buy from the Irish Xbox Store for correct language, currency, and full DLC/online access. If buying US digital, check for restrictions first.