1. First, download the anti-cheat file by clicking the **Anti-Cheat Download** button below, or copy the URL into your browser to download:

Anti-Cheat Download

https://dl.gamebuff.cn/tools/RE9.zip?2222

2. After downloading, extract the files to your desktop or another folder. Then open **Resident Evil 9: Requiem** on Steam, right-click the game, select **Manage**, and then click **Browse Local Files** to locate the game's root directory.

3. Copy the extracted file `dinput8.dll` into the game’s root directory.

4. Once copying is complete, click **Play Game** on Steam to launch the game. Then open the GameBuff software and click **Apply a BUFF** to make in-game modifications.

> Press the **Insert** key to hide the anti-cheat plugin interface.