Contingency Contract
| Contingency Contract | Seasons | Guide | Trivia |
Contingency Contract (C.C.) is a seasonal game mode in Arknights. It is accessible once 2-10 is cleared.
Overview
Contingency Contract consists of two iterations: Operation and Battleplan.
In C.C., players can run two unique operations: one that is available every day during the current season and another that is periodically rotated during the current season. Before playing C.C. operations, the player can select modifiers to alter the gameplay by buffing enemies, debuffing friendlies, and/or imposing various limitations; similar to the conditions of Challenge Mode but with a combination of multiple handicaps up to the player's choice, which is required to advance the player's progression.
C.C. operations can be extremely difficult to clear even with high-level, high-rarity Operators, so to compensate this, all C.C. operations do not consume any 
Sanity, however they are not counted towards completing regular missions and do not give out 
Credit if the player uses a Support Unit. Therefore, it is recommended to try C.C. operations as many times as possible until a solid strategy is found.
In addition, C.C. operations' result remains the same no matter how many Life Points the player have left (unless when using the Objective: Last Line of Defense modifier which reduces Life Point to 1), thus it is sometimes better to let one or two enemies through on C.C. operations if victory is to be assured.
Operation
Contracts
The modifiers in Operations came in form of Contracts.
Each Contract has a level from 1 to 3 (
), which denotes its effect; the higher the level, the more difficult the Contract will be to deal with. The sum of the selected Contracts' level denotes the C.C. operation's Contingency Level, colloquially known as Risk; hence, "Contingency Level/Risk 10" means that the total level of the Contracts used in the C.C. operation is 10. The player will be warned that the operation might be too difficult for them if the selected Contracts would give the C.C. operation a C.L. of 7 or higher.
Contracts with the same name and effect but multiple levels are mutually exclusive; the player can only use one of them at a time. This also applies to Contracts which buffs one particular enemy and those which restrict the use of Operators and/or classes.
There are also Support Contracts which make the operation easier by buffing friendly units, but do note that using Support Contracts will set the C.L. to 0, even if combined with other contracts. Players can use Support Contracts just for fun and to take a break from C.C.'s extreme difficulty, though some C.C. missions can be completed with Support Contracts.
From C.C. Barrenland onwards, the highest C.L. attained by the player in a C.C. operation also determines its rating:
 |
 |
 |
 |
 |
 |
 |
| Not cleared | 0–1 | 2–3 | 4–7 | 8–11 | 12–15 | 16+ |
When a C.C. operation is cleared, all Contracts selected for the first time will be marked as completed, indicated by a teal check mark.
Not all Contracts can be freely picked. Here, Objective: Deep Infiltration II is unavailable because the player haven't unlocked it yet, while Originium Zone: Stimulus II cannot be picked as the player already picks Originium Zone: Stimulus I.
Be sure to check the Contract's effects to avoid unexpected situations. Here, it is stated that Originium Zone: Stimulus I increases enemy ATK by 15%; Originium Zone: Erosion I reduces friendly max HP by 25%; Target: Stone Breaker II increases Rockbreakers' HP by 60%, ATK by 40%, DEF by 250, and makes them invisible; and Objective: Covert Action I reduces the squad size to 10 Operators.
Certain Contracts must be unlocked by completing a certain number of Contracts and/or spending Operation Agreements before they can be picked. Here, Originium Zone: Erosion II will be unlocked once the player completed 13 Contracts, while Target: Stone Breaker III requires the player to complete 17 Contracts and spend 2 Operation Agreements to be unlocked.
Left: The normal situation at Contingency Level 3. Right: The warning at Contingency Level 7.
This image shows that the player had not cleared Broken Path, the Permanent Site, and Transport Hub, the Rotating Site at the time, due to their D ratings.
Missions
Clearing C.C. Operation sites with a certain threshold of Contingency Level, certain Contracts, or (from C.C. Barrenland) a specific amount of Contracts are required to complete Challenge Missions (Emergency (daily) and Long-Term (event) Contingency Missions in C.C. Beta) which awards 
Operation Agreement that can be spent to unlock Contracts on the Permanent Site and/or 
Contract Bounty that can be exchanged for various items in the Secret Sanctuary.
Clearing the Rotating Site with C.L. 8 is enough to complete all Rotating Site Challenge Missions. For Permanent Site Challenge Missions, clearing the Permanent Site with C.L. 18 is sufficient; if the player wanted to trim the Path to Glory medal for clearing the Permanent Site (from C.C. Pyrite), this must be done within the C.C. event's first week.
Note that the higher the C.L., the lesser Operation Agreements and/or Contract Bounties that will be awarded from Challenge Missions. As such, it is not necessary to clear C.C. operations with more than enough C.L. — important for F2P players and those who have few or no Elite 2 Operators.
Sites
Permanent
In C.C. Beta, Contracts on the Permanent Site are initially available while the rest must be unlocked by spending Operation Agreements gained from completing Contingency Missions.
From C.C. Barrenland, most Contracts on the Permanent Site are initially available while some must be unlocked by completing a certain number of Contracts and/or spending Operation Agreements.
Rotating
Contracts for the Rotating Site changes as the operation rotates, and from C.C. Barrenland, must be unlocked by clearing the respective operation with a certain threshold of Contingency Level:
- Clearing the operation for the first time unlocks all Level 1 Contracts.
- Clearing the operation with C.L. 2 unlocks all Level 2 Contracts.
- Clearing the operation with C.L. 4 unlocks all Level 3 Contracts.
Training Ground
Introduced in C.C. Barrenland, Training Grounds will remain available outside of C.C. seasons where all previous C.C. operations are rotated daily, allowing the player to prepare for future C.C. seasons. All of the current C.C. season's Rotating Sites are always available in the Training Ground.
Contracts for Training Ground operations are different from their respective Fixed/Rotating Site versions and are unlocked in the same way as Rotating Sites, but applies to both the Training Ground and Rotating Site versions.
Battleplan
Test Criteria
- Main article: Pinch-Out Experimental Operation/Overview
The modifiers in Battleplan take form as Test Criteria (sing. Test Criterion) which follows the same mechanic as the namesake in Pinch-Out Experimental Operation where they are connected together in a network, with the only differences being the removal of Crystal Fragment and Test Plate nodes, and the effects being adjusted to be more balanced/measured (although still difficult nonetheless); notably, multiple Criteria that buffs one particular attribute no longer stacks unless specified otherwise.
As in P.O., the Test Criteria are split into six dimensions with one additional dimension:
Strategy – Test Criteria that augment enemies.
Technique – Test Criteria that causes additional enemies to appear or replace others, with some also giving them additional properties.
Dispatch – Test Criteria that restricts the usage and deployment of Operators.
Emergency Response – Various Test Criteria unlocked by completing Rotating Test Sites' missions that could make it easier to achieve high scores without buffing enemies too much.
Insight – Test Criteria that modifies the operation's environment.
Planning – Test Criteria that modifies the operation's mechanics and features.
Support – Test Criteria that aids the player. Support Criteria do not contribute to the score, thus unlike their counterpart in C.C. Operations, Support Criteria can be used with no penalties at all!
Missions
C.C. Battleplan missions are integrated to the operation's network like that of those in P.O., which includes:
- Crystal Showroom – Gives the Crystalline Treasure as the reward once all Test Criteria linked to it are completed.
- Key Node – Gives a reward once the operation is cleared while meeting certain conditions regardless of Test Criteria linked to it. Completing the Key Node's mission also turns the respective Key Node into a new Starting Point.
Test Sites
- The Main Test Site is always available during the season. The Test Criteria in the Main Test Site are grouped into Objective Sets, which awards additional score when the Test Site is cleared with all Test Criteria within that Objective Set selected.
- Rotating Test Sites are available over time throughout the season.
Combat Review
The Combat Review allows the player to view the status of their C.C. Battleplan season medals as well as the player's highest score, Sanctuary Ratings, and completed Test Criteria in the Main Test Site.