Because Steam now doesn't allow more than 1k items in a collection, here's part 4.

Original Part 1: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=353587446
Redux: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2928129714
Redux.5: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2928181870
Part 2: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=880346817
Part 3: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1686918408
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Part 5: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2840748734

This collection is no longer updated because of the 1k limit, new maps will be added to future parts.