{Updated} All Hyperdimension Neptunia Opening (2010-2023) 

I added the last two opening since nobody did it
Timestamps:
0:00 - Hyperdimension Neptunia (2010)
1:34 - Hyperdimension Neptunia Mk2 (2011)
3:13 - Hyperdimension Neptunia Victory (2012)
5:16 - Hyperdimension Neptunia Perfect Production (2013)
6:53 - Hyperdimension Neptunia The Animations (2013)
8:23 - Hyperdimension Neptunia Rebirth 1 (2013)
10:02 - Hyperdimension Neptunia Rebirth 2 (2014)
11:42 - Hyperdimension Neptunia U Action Unleashed (2014)
13:38 - Hyperdevotion Noire : Goddess Black Heart (2014)
15:31 - Hyperdimension Neptunia Rebirth 3 (2014)
17:20 - 19:02 - 20:02 - 21:02 Megadimension Neptunia VII (2015)
21:53 - Megatagmension Blanc + Neptune VS Zombies (2015)
23:36 - Superdimension Neptune Vs Sega Hard Girls (2015)
25:21 - Nep-Nep Connect: Chaos Chanpuru (2017)
26:56 - Cyberdimension Neptunia : 4 Goddess Online (2017)
29:06 - Megadimension Neptunia VIIR (2017)
30:41 - Super Neptunia RPG (2018)
32:00 - MegaMiracle Forces (2019)
33:49 - Neptunia Virtual Stars (2020)
35:38 - Neptunia Reverse (2020)
37:11 - Neptunia X Senran Kagura: Ninja Wars (2021)
38:59 - Neptunia Sisters Versus Sisters (2023)