Demo 1985 (not '84):
https://www.metal-archives.com/albums/Nucle...Vengeance/18329 (it's their 2nd demo tape).
I got their 1st demo - released in 1984, indeed! - by tape-trading, but unfortunately I have no tracklist available
It should have feature few songs only, since it's at the bottom of side B of a c-90 cassette where I already got recorded, before of N.A., 2 other demos (of other thrash bands, of course)....
That 1st Demo '84 it's not even listed on Metal-Archives, yet!