What to know
- Protoset drops from Protocol Space: Promotions at Threat Levels 3 and 4, and rewards are claimed using Sanity.
- The reward set must be switched before entering (the run shown uses the R3 prompt on the activity screen).
- One clear shown rewards 8 Protoset and 360 Operational EXP, with a displayed retry cost of 60 Sanity.
- Sanity regenerates over time and has a cap, so farming is naturally limited day-to-day.
In Arknights: Endfield, hitting the level 60 cap introduces Protoset as the new bottleneck for Operator promotions and continued leveling. This guide covers the exact spot to farm it (as shown), how the reward toggle works, and what rewards appear after a clear.
Reference details shown in the run
| Item | Value |
|---|---|
| Material needed to go past level 60 | Protoset |
| Farming activity | Protocol Space (Promotions tier) |
| Where it is | Hub area, right next to the main base |
| Reward switching | R3 on the activity screen before entering |
| Claim requirement | Spend Sanity at the end to claim rewards |
| Example run retry cost shown | 60 Sanity |
| Example rewards acquired shown | 8 Protoset, 360 Operational EXP |
Where to farm Protoset (location and activity)
Protoset farming happens through a Protocol Space node located in the Hub area next to the main base. Inside Protocol Space, higher-tier promotion missions are the ones that award Protoset, and the reward selection can be changed before entry using the on-screen R3 switch prompt.
Because the activity has a daily limit tied to resets and available Sanity, it’s normal to get capped on how many runs can be claimed in a day. Higher level brackets also affect how much Sanity is available for the day, which impacts how many claims can be done.
How Protoset fits into leveling past 60
Protoset is used for promotions that increase an Operator’s level cap beyond 60, and it can also be relevant for upgrading progression systems that require promotion materials. As progression continues, higher breakpoints (such as level 80) will demand more Protoset overall, so farming becomes a routine part of endgame growth.
How to get Protoset from Protocol Space (step-by-step with timestamps)
Step 1 – Confirm the level 60 promotion gate
Open the promotion/level screen and verify the cap at 60 plus the new required material: Protoset.
Step 2 – Go to Protocol Space near the main base
From the Hub, head to the Protocol Space activity node positioned right next to the main base.
Step 3 – Select the higher-tier promotion mission
On the Protocol Space menu, choose the higher-tier set of missions that lists Protoset as part of its rewards.
Step 4 – Switch the reward set before entry (R3)
On the screen before entering, use the R3 prompt (bottom-right) to switch the reward set and ensure Protoset is selected.
Step 5 – Check Sanity and the daily remaining limit
Look at the top of the screen to confirm current Sanity and what remains available for the day, since claiming is limited.
Step 6 – Complete the activity and claim rewards with Sanity
Finish the run, then spend the required Sanity at the end to claim the Protoset rewards.
Step 7 – Repeat after reset and check pass/challenges
If runs are capped for the day, wait for reset or use consumables that restore Sanity, and check battle pass/challenge pages for any unclaimed Protoset.
Rewards table
| Reward type | Reward | Amount | Where it appears |
|---|---|---|---|
| Material | Protoset | 8 | Rewards Acquired screen |
| EXP | Operational EXP | 360 | Rewards Acquired screen |
| Cost (context) | Sanity cost to retry | 60 | Bottom-left “Cost to try again” |
Closing notes for farming Protoset efficiently
For consistent Protoset income, prioritize the promotion-focused Protocol Space run with the correct reward set selected before entry, then plan claims around available Sanity and daily reset timing. Keeping Sanity from overcapping and confirming the reward toggle each time prevents wasted runs without Protoset selected.
