---
title: "GO-1 Ending a Grand Overture Drop Rates (US server)"
description: "GO-1 Ending a Grand Overture drop rates on the US server: Orirock 74.54%, Sugar Substitute 50.46%, Ester 46.53%; 432 samples (2025-04-08 to 2025-04-22). Sanity cost 9. Updated 2026-10-23. Crowdsourced Arknights drop data by Penguin Statistics."
lang: en
server: US
zone_id: "act37side_zone1"
stage_id: "act37side_01"
as_of: 2026-10-23T14:49:32Z
time_zone: UTC-7
rows: 7
rows_total: 7
canonical: "https://penguin-stats.io/en/result/us/stage/act37side_zone1/act37side_01"
api: "https://penguin-stats.io/PenguinStats/api/v2/result/matrix?server=US&stageFilter=act37side_01&show_closed_zones=true"
license: CC BY-NC 4.0
license_url: https://creativecommons.org/licenses/by-nc/4.0/
attribution: "Data: Penguin Statistics (penguin-stats.io), CC BY-NC 4.0"
---

# GO-1 Ending a Grand Overture Drop Rates (US server)

Server: [CN server](https://penguin-stats.io/en/result/cn/stage/act37side_zone1/act37side_01.md) · **US server** · [JP server](https://penguin-stats.io/en/result/jp/stage/act37side_zone1/act37side_01.md) · [KR server](https://penguin-stats.io/en/result/kr/stage/act37side_zone1/act37side_01.md)

Sanity: 9

Item drops of GO-1 Ending a Grand Overture on the US server, by percentage, highest first

| Item | ID | Loots | Samples | Percentage | Sanity Required Per Item | Time Range |
| --- | --- | ---: | ---: | ---: | ---: | --- |
| [Orirock](https://penguin-stats.io/en/result/us/item/30011.md) | `30011` | 322 | 432 | 74.54% | 12.07 | 2025-04-08 to 2025-04-22 |
| [Sugar Substitute](https://penguin-stats.io/en/result/us/item/30021.md) | `30021` | 218 | 432 | 50.46% | 17.83 | 2025-04-08 to 2025-04-22 |
| [Ester](https://penguin-stats.io/en/result/us/item/30031.md) | `30031` | 201 | 432 | 46.53% | 19.34 | 2025-04-08 to 2025-04-22 |
| [Diketon](https://penguin-stats.io/en/result/us/item/30051.md) | `30051` | 171 | 432 | 39.58% | 22.74 | 2025-04-08 to 2025-04-22 |
| [Oriron Shard](https://penguin-stats.io/en/result/us/item/30041.md) | `30041` | 170 | 432 | 39.35% | 22.87 | 2025-04-08 to 2025-04-22 |
| [Damaged Device](https://penguin-stats.io/en/result/us/item/30061.md) | `30061` | 134 | 432 | 31.02% | 29.01 | 2025-04-08 to 2025-04-22 |
| [Furniture](https://penguin-stats.io/en/result/us/item/furni.md) | `furni` | 7 | 432 | 1.62% | 555.56 | 2025-04-08 to 2025-04-22 |

Samples: runs of the stage reported in the time range. Loots: total number of the item dropped in those runs. Percentage = Loots ÷ Samples, the expected number dropped per run, which can exceed 100%. Sanity Required Per Item = Sanity ÷ Percentage. Time Range: since the drop table of the stage last changed.

Updated 2026-10-23 07:49 (UTC-7). [Full data (JSON)](https://penguin-stats.io/PenguinStats/api/v2/result/matrix?server=US&stageFilter=act37side_01&show_closed_zones=true). License: [CC BY-NC 4.0](https://creativecommons.org/licenses/by-nc/4.0/)