Are you looking to within this version, or are you interested in the coding architecture of the game?
If you are looking at this file on a third-party hosting site: Last.Dream.Update.01.03.2018.rar
The game is built on RPG Maker VX Ace. The .rar format for updates during this period suggests a manual patching process often used for non-Steam versions or DRM-free builds. Are you looking to within this version, or
White Giant RPG Studios is known for "Old School" sensibilities. Development focuses on non-linear progression and deep character customization (over 500 unique abilities). The 2018 updates were designed to ensure that the massive breadth of choices didn't lead to "game-breaking" state conflicts. White Giant RPG Studios is known for "Old
If you own the game on Steam, you do not need this manual file; the platform will have already integrated these fixes into the current build.
Adjusting the difficulty of late-game bosses and encounter rates. Development Review
Improved compatibility with modern Windows OS versions.