There is no iron age halberds. I don't know what @Duileoga meant by Alabardero.
Battle chariots are attested through the finding of horse bits (snaffles), yoking fittings (such as terrets/rein-rings), iron tire fragments and bronze axle-caps. I think several items of those categories have been reliably found in Ireland.
How accurate are chariots and halberds?
My understanding is chariots show up a lot in early medieval epics, but there are not any finds from ancient times.
Andrew Martz, a former senior software engineer at World's Edge, confirmed in a separate LinkedIn post that the studio's next project was cancelled as part of its reorganisation under Activision.
People made a meme about the future: