问题拆分
Readers often confuse a player-facing mashup product with a general game engine or an official modding SDK.
记录预期结果和第一次失败的位置，并确保每次修改都可以撤销。
实践步骤
Use the official Melty site for current product behavior, verify the individual mashup requirements, and keep a backup and restore path before changing a game installation.
使用原创占位素材和离线测试环境，开始前先备份。
验证与记录
Check one listing, its required games, its install flow, its uninstall behavior, and whether its multiplayer claims apply to that specific mashup.
记录版本、步骤、结果和恢复方式，形成短小的现场笔记。