3rd Slot
Tome Slots
- Quest requirement
- Complete 35 lifetime Quests
- Next action
- Buy Tome Slots in the Shop
- Result
- Maximum capacity rises from 2 to 3 Tomes
Quick Answer
Megabonk starts you with two Tome slots. Complete 35 Quests, then buy Tome Slots in the Shop to get slot 3. Complete 55 Quests, then buy Tome Slots 2 to get slot 4.
The Quest milestone does not add the slot immediately. It makes the matching permanent upgrade available in the Shop; you must still purchase it with Silver.
Tome Slot Requirements
4th Slot
Tome Slots 2
- Quest requirement
- Complete 55 lifetime Quests
- Next action
- Buy Tome Slots 2 in the Shop
- Result
- Maximum capacity rises from 3 to 4 Tomes
Current milestone sequence: the third Tome slot unlocks later than the third weapon slot, and the fourth Tome slot unlocks later than the fourth weapon slot. Do not use older guides that still tell you to complete about 60 Quests.
How to Get the 3rd and 4th Tome Slots
- Build your lifetime total to 35 completed Quests.
The objectives can be completed across different runs; this is not a one-run challenge. - Return to the Shop and find Tome Slots.
Reaching the milestone reveals the permanent capacity upgrade but does not buy it for you. - Purchase Tome Slots with Silver.
Once purchased, new runs can carry a maximum of three Tomes. - Continue to 55 completed Quests.
This later milestone reveals the separate upgrade named Tome Slots 2. - Purchase Tome Slots 2 in the Shop.
The second permanent upgrade raises your maximum capacity from three Tomes to four.
What Counts Toward 35 or 55 Quests?
Lifetime completed Quests
The game tracks eligible objectives across runs. You do not need to complete 35 or 55 objectives during one stage.
Not character level
“35 Quests” does not mean reaching Level 35 during a run. Character and Tome levels reset between runs; lifetime Quest progress does not.
Not Tome discoveries
Unlocking a Tome adds it to your available content pool. It does not increase the number of Tomes one run can hold.
Not purchase count
Buying characters, weapons, Items and Tomes uses a different counter. Purchase count is relevant to Toggler, not Tome Slots.
Should You Unlock and Use All Four Tome Slots?
| Capacity | Main advantage | Main tradeoff | Good use case |
|---|---|---|---|
| 2 Tomes | Levels concentrate into a very small stat package. | You give up important utility or scaling categories. | Focused unlock challenges that need one or two Tome effects quickly. |
| 3 Tomes | Balances damage, economy and survival without spreading levels too widely. | The third Tome competes for level-up choices. | Most progression runs after the first capacity upgrade. |
| 4 Tomes | Supports a complete package such as XP, damage, coverage and defense. | More Tomes can dilute upgrades when one Tome must reach a high level fast. | Developed builds and long runs with clear Tome roles. |
Maximum does not mean mandatory: buying a slot raises capacity but does not force you to take another Tome. For an unlock such as reaching a specific Tome level before a time limit, leaving a slot open can keep more levels focused on the required Tome.
Tome Slot Troubleshooting
Achievement appeared, slot did not
Return to the Shop and purchase the matching permanent upgrade. The milestone only makes it available.
Upgrade is missing from the Shop
Confirm that the counter is completed Quests, not unlock purchases, character level or Tome discoveries. The required totals are 35 and 55.
Fourth slot is still locked
Tome Slots 2 is a separate Shop Upgrade. Owning the third slot does not bypass the 55-Quest milestone or the second purchase.
Weapon capacity did not change
Expected behavior. Tome and weapon slots are independent upgrades with different milestone totals.
A run still shows fewer slots
Check that the permanent upgrade was purchased on the same save and restart the run after completing the Shop purchase.
You want a smaller Tome pool
Do not accept an unwanted Tome. Extra capacity is optional; Toggler changes eligible content, not slot capacity.
Weapon Slots vs Tome Slots
| Permanent upgrade | Completed Quests | Capacity unlocked | Detailed guide |
|---|---|---|---|
| Weapon Slots | 25 | Third weapon slot | Weapon Slots guide |
| Tome Slots | 35 | Third Tome slot | This page |
| Weapon Slots 2 | 45 | Fourth weapon slot | Weapon Slots guide |
| Tome Slots 2 | 55 | Fourth Tome slot | This page |
Tome Slots FAQ
How many Tome slots do you start with?
You begin with two. Permanent Shop Upgrades raise maximum capacity to three and then four.
How do I get the fourth Tome slot?
Complete 55 lifetime Quests, return to the Shop and purchase Tome Slots 2.
Why did completing 35 Quests not give me a slot?
The milestone unlocks Tome Slots in the Shop. Purchase that permanent upgrade with Silver to activate the third slot.
Are Tome slots and weapon slots the same?
No. Weapon slots unlock at 25 and 45 completed Quests. Tome slots unlock at 35 and 55. Each category has its own Shop purchases.
Does Toggler unlock more Tome slots?
No. Toggler lets you control eligible unlocked content before a run. It does not change Tome capacity. See the Toggler guide.
Are four Tome slots always better?
They offer more build flexibility, but a focused challenge may benefit from taking fewer Tomes so level-up choices stay concentrated.