Rpg Maker Developers Group

I'm looking into some of the plugins made by Fallen Angel Olivia, and noticed she has a Sample Project containing all the plugins I want to use for my project: (https://fallenangelolivia.itch.io/octopack-battler-sample-project) Specifically, I just want to use Side Battle UI, Battle Effects, Order Turn Battle, and Victory Sequence. As of right now, the Sample Project is on sale and quite a bit cheaper than the entire pack of plugins, so I want to take advantage while I can.

However, I'm finding the description kind of confusing and am not sure how this works exactly.

This is a sample project that contains a plugin with the 8x OctoPack Battler plugins compiled together and a pre-built setup to let you create a game to get the battle system running right out of the box.

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If I'm understanding this right, this is a game and not just a plugin? And the plugin itself is a single plugin that contains the function of all the listed plugins?

If you buy it, you can create a game on top of it, use the skills I've recreated, use the items, weapons, armors, states I've made, modify them if you want to your liking, or just even release a full game using the systems I've set up inside of it!

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When it says "on top of," does this mean I have to use the included game as a base to make my own game, or can I simply use the plugin?

Mostly my main concern is, if I buy this, can I take the plugin by itself and add it to my existing game, and will this essentially serve the same purpose as buying the individual plugins and putting them in there instead? I don't want to buy the entire pack and then find out that it's incompatible with the game I've already built.