Underground Cave is a dungeon in Hyperdimension Neptunia Re;Birth3: V Generation unlocked in Chapter 3. It has two parts, Underground Cave and Castle Chambers.
Treasure
The following items can be found in the dungeon. Items in the treasure chest can only be obtained once. Numbers are marked on the map to denote those treasure chests.
Note 1: Hidden Items are now replaced with hidden item blocks. All hidden item blocks are present in the dungeon at all times. However, only one of the hidden item block drops item(s) at any given run through the dungeon. They will however give credits if you jump to them.
Underground Cave
| Treasure | Hidden Treasure | Gathering Points (Change Dungeon and Big Dungeon Change OFF) |
Gathering Points (Change Dungeon ON) |
Gathering Points Big Dungeon Change ON |
|---|---|---|---|---|
| 1) Plan: Eject Button | Light Blue Pigment x1-2 | Copper Ore x1-3 | Copper Ore x1-2 | Copper Ore x1-3 |
| 2) Healing Drink | History Lv. 2 x3-5 | Herb x1-2 | Mysterious Petal x1-2 | Herb x1-2 |
| 3) Plan: Exuberant Fragment | Muddy Lv. 2 x4-5 | World Tree Leaf x1-2 | Wicked Heart x1-2 | Non-RPG Growth Lv. 1 |
| 4) Hover Movement Lv. 2 x3 | Glowgrass x1-2 | Mysterious Petal | Cell Antenna x1-2 | Novel Lv. 2 |
| 5) Plan: Bladed Hammer | - | Wicked Heart x1-2 | Earth Crystal x1-2 | Animal Lv. 1 |
| - | - | Cell Antenna x1-2 | - | Special Controller Lv. 2 |
| - | - | Earth Crystal x1-2 | - | - |
Castle Chambers
| Treasure | Hidden Treasure | Gathering Points (Change Dungeon and Big Dungeon Change OFF) |
Gathering Points (Change Dungeon ON) |
Gathering Points Big Dungeon Change ON |
|---|---|---|---|---|
| 1) Healing Pod | Fantasy Lv. 2 x3-5 | Herb x1-2 | Unexploded Shell x1-2 | Herb x1-2 |
| 2) Tuffmil x2 | Glowgrass | Healing Herb x2-3 | Healing Herb x2-3 | Healing Herb x2-3 |
| 3) SP Charger x3 | Hover Movement Lv. 2 x1-2 | Glowgrass x1-3 | Glowgrass x2-3 | Glowgrass x2-3 |
| 4) P. SP Charger x4 | Light Blue Pigment x1-2 | Iron Fragment x1-2 | Iron Fragment x1-2 | Idol Lv. 1 |
| 5) Life Fragment | SP Charger x3-5 | Red Petal x1-2 | Red Petal x1-2 | Handsome Man Lv. 2 |
| - | - | - | - | Pixel Lv. 1 |
| - | - | - | - | Pinch Revival Lv. 2 |
Monsters
- Main article: Bestiary/Re;Birth3
- Enemies marked with * require the "Change Dungeon" plan active.
- Enemies marked with ** require the "Big Dungeon Change" plan active.
- Enemies in bold are considered Dangerous Monsters.
Underground Cave
Common Type
| Name | Drop 1 | Drop 2 | Drop 3 |
|---|---|---|---|
| Nanovader | Cell Antenna | - | - |
| Earth Golem | Earth Crystal | - | - |
| Viral Earth Golem | Earth Crystal | - | - |
| Aluna | Mysterious Petal | - | - |
| Viral Aluna | Mysterious Petal | - | - |
| Strange Person | Wicked Heart | - | - |
| Self-Defense System | Unexploded Shell | - | - |
| Ice Whale* | Monster Lv. 3 | - | - |
| Doomsday Messanger** | Guitar Controller | Large Medal F | - |
Castle Chambers
Common Type
| Name | Drop 1 | Drop 2 | Drop 3 |
|---|---|---|---|
| Lowee Solider | Iron Fragment | - | - |
| Apeldoom | Red Petal | - | - |
| Aluna | Mysterious Petal | - | - |
| Viral Aluna | Mysterious Petal | - | - |
| Lowee High Guard | Iron Fragment | - | - |
| Self-Defense System | Unexploded Shell | - | - |
| Ice Whale* | Monster Lv. 3 | - | - |
| Doomsday Messanger** | Guitar Controller | Large Medal F | - |
Scripted Type
| Name | Drop 1 | Drop 2 | Drop 3 |
|---|---|---|---|
| Mister Badd | Unexploded Shell | Add Memory - 1024MB | - |
Quest
- Main article: Quest/Re;Birth3
Rank S
| Rare Guitar Controller | Credits: 2500 | Type: Find |
| Shares | Reward | Key Content |
| Share Gain: Planeptune +6% Share Loss: Lowee -6% |
Free Scenario Lv. 1 | Guitar Controller x1 |
Rank B
| Forced Friendliness | Credits: 2500 | Type: Hunt |
| Shares | Reward | Key Content |
| Share Gain: Lowee +5% Share Loss: Lastation -5% |
Tuffmil | Ice Whale x1 |
| Really... | Credits: 2500 | Type: Find |
| Shares | Reward | Key Content |
| Share Gain: Lastation +4% Share Loss: Lowee -4% |
Famous Voice Lv. 1 x2 | Unexploded Shell x2 |
Rank D
| A Heavy Request! | Credits: 2500 | Type: Find |
| Shares | Reward | Key Content |
| Share Gain: Planeptune +3% Share Loss: Lowee -3% |
Life Fragment x5 | Earth Crystal x3 |
Rank E
| Suspicious Folk | Credits: 2500 | Type: Hunt |
| Shares | Reward | Key Content |
| Share Gain: Lowee +6% Share Loss: Lastation -6% |
Fight Lv. 1 | Strange Person x1 |
Story
Chapter 3
With the four CPUs behind bars in a dungeon, the CPUs ponder what to do, as Blanc does not know the way out since Mister Badd built the dungeon. Noire acts rudely to Blanc. Plutia decides to cheer Blanc up by forcing her to admit her loneliness then deciding to befriend her. Once that is taken care of, the girls are back wandering how to escape the prison.
The mysterious girl, that Neptune knows, returns to save the girls. Noire wonders where she ran off while the girls happy to be free leaves. Noire has little time to suspect her before leaving. In the dungeon, Noire has a plan to regain Lowee's lost shares, publicly defeat Mister Badd.
Once they leave the dungeon and head into the center of Castle Chambers, they find Mister Badd trying to prepare the perfect speech to claim Lowee. Mister Badd is surprised to how they got free to which Neptune asks him why he thought he could keep the main characters trapped in a dungeon. He realizes this mistake but then reminds them if Blanc cannot transform and defeat him, the Seven Sages would have accomplished their task, removing a CPU, even if he is defeated.
Plutia and Neptune decide to put their faith in Blanc. Noire reluctantly follows suit and Blanc regains her HDD. Plutia forces Warechu to film and then they defeat Mister Badd. They force him to confess his plot and torture him a little. With that all done Lowee returns to Blanc's control.
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