Pour fêter les 20 ans de carrière du groupe, Nuclear Blast va sortir un nouveau best of de Nightwish le 9 Mars. Intitulé Decades (Best of 1996-2016) , il contiendra 22 titres remasterisés répartis sur 2 CD's.

CD1:

1. The Greatest Show On Earth (Remastered)
2. Élan (Remastered)
3. My Walden (Remastered)
4. Storytime (Remastered)
5. I Want My Tears Back (Remastered)
6. Amaranth (Remastered)
7. The Poet And The Pendulum (Remastered)
8. Nemo (Remastered)
9. Wish I Had An Angel (Remastered)

CD2:

1. Ghost Love Score (Remastered)
2. Slaying The Dreamer (Remastered)
3. End Of All Hope (Remastered)
4. 10th Man Down (Remastered)
5. The Kinslayer (Remastered)
6. Dead Boy's Poem (Remastered)
7. Gethsemane (Remastered)
8. Devil & The Deep Dark Ocean (Remastered)
9. Sacrament Of Wilderness (Remastered)
10. Sleeping Sun (Remastered)
11. Elvenpath (Remastered)
12. The Carpenter (Remastered)
13. Nightwish (Demo, remastered)