Contingency Contract Underdawn
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| Season | Cryst. Sanct. | OST |
| This Contingency Contract season is not yet released in the Global server of Arknights; the information are based on tentative translations which may not represent the official English localization and will be updated when the season's Global release is announced. |
- This article is about the Contingency Contract event. For the song, see Battleplan Underdawn.
Contingency Contract #2: Battleplan Underdawn, often simply known as Contingency Contract Battleplan #2 (CCB2) or Contingency Contract Underdawn (C.C. Underdawn) is the sixteenth season of the namesake seasonal event in Arknights and the second iteration of C.C. Battleplan.
Operations
| Main Test Site | Immortal Hall |
|---|---|
| Rotating Test Sites | Dryreed Bog • Fortified Pass • Moonset Alley • Research Base Quarantine Zone |
Sanctuary Ratings
| Part of this section still uses the original Chinese texts. You can help the Arknights Terra Wiki by translating it. Please read the translation guidelines first before translating the section. |
| Rating | Information |
|---|---|
| 裂潮之人 | In Immortal Hall, do not allow more than 10 tiles to be infested with Nethersea Brands. |
| 不惧深溟 | In Immortal Hall, have at least 3 friendly units on Nethersea Brands. |
| Tough Frontline | Score 60 Strategy points. |
| Stalwart Frontline | Score 130 Strategy points. |
| Precise Strike | Score 110 Technique points. |
| Pinpoint Accuracy | Score 220 Technique points. |
| Ingenious Strategist | Score 110 Emergency Response and Dispatch points combined. |
| Flexible Responder | Score 210 Emergency Response and Dispatch points combined. |
| Proper Assignment | Deploy Operators no more than 9 times. |
| The More The Merrier | Deploy Operators at least 20 times. |
| Human Wave | Deploy Operators at least 30 times. |
| Sniper Ops Expert | Have at least 4 Snipers in the squad. |
| Arts Ops Expert | Have at least 4 Casters in the squad. |
| Melee Ops Expert | Have at least 4 Guards in the squad. |
| Support Ops Expert | Have at least 4 Supporters in the squad. |
| Assault Ops Expert | Have at least 4 Vanguards in the squad. |
| Specialist Ops Expert | Have at least 4 Specialists in the squad. |
| Medic Ops Expert | Have at least 4 Medics in the squad. |
| Defender Ops Expert | Have at least 4 Defenders in the squad. |
| Highly Thrifty | Have 10 or less DP remaining when the operation is cleared. |
| 与海共生 | In Immortal Hall, let Nethersea Brands infest every single low ground tile on the map.[note 1] |
- ↑ Immortal Hall has a total of 33 low ground tiles where Nethersea Brands can spread onto;
Environment: 下部浸透 must be selected to ensure that the Nethersea Brand covers the whole map.
Operators
Headhunting
- Main article: Headhunting/Banners/Upcoming
The fourteenth Joint Operation headhunting banner is featured.
Store
The following packs are available in the Packs Store, which can only be purchased once per account:
| Pack | Content | Price |
|---|---|---|
Contingency Support Pack  |
 12 |
CN¥30 |
Crisis Averting Funding Box  |
 16  700K |
CN¥68 |
Contingency Support Integrated Data Box  |
 90  30 24 |
CN¥68 |
Miscellaneous
During the event, all supply operations are available.