1、解压缩
2、安装升级补丁到游戏目录中
3、复制SKIDROW目录下的未加密补丁到游戏目录中覆盖
4、开始游戏

更新说明：

911 Operator: First Response v1.04.21 Update changelog:
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v1.04.21
- calls answering can be disabled in Free Game mode
- workshop support for custom languages!
- calls files can now be edited
- custom calls can now be added (and started by codes)
- disappearing vehicles fixed
- some empty lines in calls fixed
- minor changes

By SKIDROW