I was planning on adding to that th rblxRP however never got round to actually adding it.
Adding developer provided presences is quite tricky, and even more so when you do 100% of the presence checking on the client than rather on the server (like RoPresence.)
It’s something that’s still on my list of things to do, but not top priority at the moment.
I’ll see if I can push an update. However I won’t be able to test it, so if it doesn’t work, just try the older version.
Unsure how you’d cause RCE with this one. All data is fetched using the Roblox APIs and sent directly to Discord. This application never connects to any servers out side of this, except for an update check which downloads a list of games which is stored here on GitHub Gist… If you find any issues, the code is completely open source, and if you find any issues, I’d be more than happy to fix them.
Just released 3.0.0! 
It’s a total rewrite of rblxRP that should bring a lot more improvements in the future, and greater stability.
The only current user facing change is the new config page, however the ability for games to provide presence information is planned!
Download → http://rblxrp.xyz
roblox studio rich presence :3?
soon™
(expect it a few days)
The icon doesn’t change to the games icon I’m playing. Is there any reason for this?
What game are you playing? Due to Discord limitations there are only so many games that can have icons, and I have to manually upload them to Discord
Some newer games that were released just only months ago. Also just went on Lumber Tycoon 2 and notice the icon works for that. Will it ever be possible for you to make it able to automatically detect the game icon and set it as that?
Sadly not, Discord doesn’t provide a way to just pass an image along with the rich presence. I have to upload an icon to Discord’s website every time I want to add a new game.
(now while it’d be technically possible to cycle in the most popular games, I don’t feel like capturing analytics on users, and interacting with the Discord API in which breaks the terms of service)
Maybe allow other users (who must be put on a whitelist to avoid uploading inappropriate images) to contribute by allowing them to upload other game icons.
Currently, my solution for that is just allowing people to send me a message with a game and I’ll add it when I’m free
Hm. Will you eventually find another way of doing it?
As I said, I would still have to manually upload the images to Discord, logged in as my account. The volume is low enough so that I can just handle them on a one by one basis when people dm me
Not possible, as there’s a limit of 100 custom images through Rich Presence iirc, and the only way to get them to show up is to upload them to the application on the developer portal.
3.2.0 released 
Fixed some bugs and because Discord enabled the feature that allowed us to pull images directly from Roblox without having to manually upload it to Discord ourselves
Download → http://rblxrp.xyz
Is this an opt-in feature or something Discord has to turn on for you?
It seems to be enabled for everyone. I didn’t have to do anything special to get access to it.