Scoredoom is not skulltag really but it did have a skulltag version once before tho
it was made by bilbohicks in 2006-2012-2014-till now as its final version is 3.0r5b
will provide download links for the versions i came across
2006-2009
Version 2.3.1
2012 : mainly if you want to know the difference it is 3.0r4Hc with the shieldsphere having a orange like gold like color instead of the see through lite color from newer versions