Comeback missions act as an incentive for players who have not played Arknights for a long time to return to the game, available if the player does not login to Arknights for more than 60 days (~2 months) as long as they meet the following conditions:
- The player is at Level 8 or higher.
- The player had cleared 1-10 (the rating does not matter).
- The player had completed all beginner missions.
Once the above conditions are met, the missions will be available on the daily reset of their first login within the aforementioned timeframe (04:00 UTC-7).
Upon checking the mission progress for the first time (from the main menu), the following items will be awarded:
In addition, for the next 7 days after the comeback missions are activated (counting the day when the missions are activated as the first), all supply operations will be always available for the player; in the event that all supply operations are always available due to an event, the timer will only start when the corresponding event ends.
Missions[edit]
| New Content
|
Mission
|
Reward
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| New Main Theme
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Clear any stage 1 times.
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| Clear any stage 3 times.
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| Clear any stage 6 times.
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| Clear any stage 9 times.
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| Clear any stage 12 times.
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| Clear any stage 15 times.
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| Clear any stage 18 times.
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| Clear any stage 21 times.
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| Clear any stage 25 times.
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| Integrated Strategies
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Clear Stage 3-8
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| Comlpete 10 nodes in Integrated Strategies.
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| Reclamation Algorithm
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Spend 10 Decision Points in Reclamation Algorithm.
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| Stationary Security Service
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Complete 1 level of Stationary Security Service.
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| Annilhilation Proxy
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Obtain a total of 200 Orundum in Annilhilation.
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| Obtain a total of 500 Orundum in Annilhilation.
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| Obtain a total of 1000 Orundum in Annilhilation.
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| Obtain a total of 1500 Orundum in Annilhilation.
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| Obtain a total of 2000 Orundum in Annilhilation.
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| Operator Modules
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Own 1 Elite 2 Operator.
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| Complete 1 Module Mission.
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| Unlock 1 Module.
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| Obtain Building Resources
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Complete 6 orders.
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| Complete 18 orders.
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| Complete 30 orders.
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| Complete 42 orders.
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| Complete 65 orders.
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| Recruitment
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Complete 1 Recruitment.
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| Complete 5 Recruitment.
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| Complete 10 Recruitment.
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| Complete 15 Recruitment.
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| Complete 20 Recruitment.
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| Complete 25 Recruitment.
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| Regular Rewards
|
Collect 5 Daily Mission rewards.
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| Collect 10 Daily Mission rewards.
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| Collect 15 Daily Mission rewards.
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| Collect 20 Daily Mission rewards.
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| Collect 25 Daily Mission rewards.
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| Collect 30 Daily Mission rewards.
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| Collect 35 Daily Mission rewards.
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| Collect 40 Daily Mission rewards.
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| Collect 45 Daily Mission rewards.
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| Collect 50 Daily Mission rewards.
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| Collect 55 Daily Mission rewards.
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| Collect 60 Daily Mission rewards.
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The following missions award 
Second Authentication Emblem which can be exchanged with the following items at the cost of 100 :
- 1
Headhunting Permit
- 100000
LMD
- 20
Strategic Battle Record
- 2
Optimized Device
- 2
Incandescent Alloy Block
- 1
White Horse Kohl
- 2
Keton Colloid
- 2
Orirock Concentration
Upon reaching the 15th day, the amount of Second Authentication Emblems will be reset.
The day where the comeback missions are activated is counted as the first day for the following missions.
| Days
|
Mission
|
Reward
|
| All
|
Spend a total of 60  Sanity.
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| 3, 6, 10, 13
|
Use  Drone to accelerate a Factory production or Trading Post order 1 time.
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| 1, 4, 7, 11, 14
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Clear a Main Theme operation 1 time.
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| 1, 4, 8, 11, 14
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Clear an operation with a Support Unit.
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| 1, 5, 8, 11
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Upgrade the skills of an Operator 1 time.
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| 2, 5, 8, 12
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Spend a total of 100  Credit.
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| 2, 5, 9, 11
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Spend a total of 2000 LMD.
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| 2, 6, 9, 12
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Use a total of 10 Battle Records (of any type).
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| 3, 6, 9, 13
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Change the Support Unit 1 time.
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| 3, 7, 10, 13
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Collect 1 clue in the Reception Room.
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| 4, 7, 10, 14
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Refresh the recruitment tags 1 time.
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Long-Term[edit]
7-days Login[edit]
Login to Arknights for 7 days (counting the day where the comeback missions are activated as the first) to claim the following rewards.
| Day 1
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| Day 2
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| Day 3
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| Day 4
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| Day 5
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| Day 6
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| Day 7
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