The Opening Event is an event to commemorate the release of Arknights' Global server, which spans across three parts.
Headhunting
- Main article: Headhunting banners
The Newbie Pool headhunting banner is introduced.
Outfits
Fang's Cruciata outfit is introduced.
Furniture
The Sami Countryside Villa furniture set is introduced as lucky drops of most operations except Challenge Mode and Annihilation.
Miscellaneous
- Until January 18, 2020, all daily and Chip operations are always available.
- Until January 19, 2020, all players will receive 100
Sanity (given as an in-game mail) daily.
Event Missions
During the event, complete the given missions to receive an assortment of rewards.
| Mission | Reward |
|---|---|
Spend a total of 100  .
|
 30 |
| Spend a total of 300 .
|
 10 |
| Spend a total of 500 .
|
|
| Spend a total of 1000 .
|
 2 |
| Defeat 200 enemies. |  6 |
| Defeat 600 enemies. |  6 |
| Defeat 1000 enemies. |  3 |
| Defeat 2000 enemies. | 2 |
Spend a total of 20000  .
|
 3 |
| Spend a total of 50000 .
|
5 |
| Spend a total of 100000 .
|
 1 |
| Spend a total of 150000 .
|
2 |
| Have Operators gain a total of 10000 EXP. |  10K |
| Have Operators gain a total of 20000 EXP. | 15K |
| Have Operators gain a total of 50000 EXP. | 20K |
| Have Operators gain a total of 75000 EXP. | 2 |
The Newsgirl outfit for Amiya will be awarded once all other missions are completed.
Headhunting
- Main article: Headhunting/Banners/Former/2020
The Glory of Silverash headhunting banner is featured from January 22, 2020 to February 5, 2020.
Miscellaneous
From January 22, 2020 to January 28, 2020, players will receive a 
Salted Egg Yolk Flavor Chocolate (given as an in-game mail) daily.
Outfits
Hibiscus' Night Watcher outfit is available for free at the Outfit Store.
Miscellaneous
During the event, players will receive a 
Burger Set For Two (given as an in-game mail) daily.