Really, you're here either because you want to get easy jade armor, or because you want to patch this exploit. If you want to patch this, then please skip to the "Please Patch" section at the bottom. Cuz also, this guide relies on you having already found a Richmond Town. However, if you have not even progressed that far in the game before looking up a guide, you are probably the target audience for the Large Noob Maze, and should stop wasting my time.

Moreover, the steps to get your easy jade armor are as follows:
1. Once you know where it is, use your waypoint to get to the Richmond Library
2. Now, go to the arcade.
3. Directly go to the second to top floor, there is jade armor
4. Since they will eat your armor, you must leave the arcade quickly.
5. End this by going back to the waypoint and go to wherever you were before
Well, if you haven't located a Richmond Library, then go to the "Where Library" section. Ergo, if you haven't found Richmond, reread the "Intro" section.

Really, I learned of the location of the Richmond Library when I went to the I1 library in the Botany Lab, which you get to by following the Main Path. So, if you do not like spoilers, then what I have already spoiled for you should be enough to know that 1 of the textboxes in the I1 library mentions the location of the Richmond Library.
If you don't care about spoilers and really want to know, then have a hint:
- Read the first letter of each sentence (not including Section Titles) for the location of the Richmond Library
- If you need another hint: roolf dn2 eht no s'ti

The Richmond Library's Arcade lets you get a ton of health and jade armor. You can then immediately exit the arcade with almost no loss whatsoever, and this is right next to the library's waypoint, so you effectively have jade armor AND 300% HP next to a waypoint. I suggest making the Arcade save the player's HP and armor before they enter, and then reloading that after, similar to how the ammo doesn't get refilled. I'm assuming this is an exploit because the location of this Jade Armor is not noted on the Location Room: Armor textboxes, found in Hinesburg. If this is intentional, then the real patch would be to allude to the existence of the Jade Armor in that textbox.
Or dont. That would probably prevent people from realizing the exploit :P.