This does not say the rest that were sleeping were raised, especially if you take into consideration 15:23.
Revelation 20:4-5 (HCSB)
[SUP]
4 [/SUP] Then I saw thrones, and people seated on them who were given authority to judge. ⌊I⌋ also ⌊saw⌋ the people who had been beheaded because of their testimony about Jesus and because of God’s word, who had not worshiped the beast or his image, and who had not accepted the mark on their foreheads or their hands. They came to life and reigned with the Messiah for 1,000 years.
[SUP]
5 [/SUP] The rest of the dead did not come to life until the 1,000 years were completed. This is the first resurrection.
It is not saying the REST OF THE DEAD are part of the fiirst resurrect, it is saying up to the start of the 1000 year Earthly Reign of Jesus
all those who were raised are part of the First Resurrection, which is the Resurrection of the Righteous, including the Tribulation Saints. The REST OF THE DEAD are Unbelievers it face their Righteous Judge.
The Resurrection of the Righteous takes place in phases:
Acts 1:6-7 (HCSB)
[SUP]
6 [/SUP] So when they had come together, they asked Him, “Lord, are You restoring the kingdom to Israel at this time?”
[SUP]
7 [/SUP] He said to them,
“It is not for you to know times or periods that the Father has set by His own authority.
1 Corinthians 15:21-23 (CSBBible)
[SUP]
21 [/SUP] For since death came through a man,
the resurrection of the dead also comes through a man.
[SUP]
22 [/SUP] For just as in Adam all die, so also in Christ all will be made alive.
[SUP]
23 [/SUP]
But
each in his own order: Christ, the firstfruits; afterward, at his coming, those who belong to Christ.