[Razor12911]

1) Short answer, no. Far Cry Primal, Watch Dogs 2 and Watch Dogs Legion use modified lz4 because the devs thought this was a good idea. Far Cry 5 use the normal version along with New Dawn.

2) Yes, *.ini and *.xtl files are no longer needed after compressing. But the libraries they come with are needed.

3) Yes, apart from Far Cry Primal, Watch Dogs 2, Watch Dogs Legion as these three require libdunia which was removed before and I'm currently busy making a plugin version of it.

4) you can add 0x, $ or # which symbolizes Hexadecimal or just remove it, Up to you. Xtool will check if 0x exists before the key and if it does, it will remove it and if it doesn't, it will convert the key to binary so it uses it on decryption function.

5) "XTool already has support for methods", well the answer is yes and also no. XTool does support these methods yes, but you can't use -mlz4 on a lz4 compressed game and expect xtool to precompress it because scanning for lz4 streams is almost impossible but these "plugins", *.xtl, *.ini and *.dll are the ones that help lz4 by telling it where to find the streams. As for zstd, -mzstd works because scanning for zstd is easier.

You just need to wait for me to update the documentation so you know how to write your own plugin to be able to add support to a game that xtool doesn't have native support for.