Master Builder
Get 25 subscriptions and an overall positive rating on a mod you published to the Steam Workshop

So, you have created a mod and published it to the steam workshop. Now you are trying to figure out how to get 25 subscribers when the game discussion boards are dead. Luckily, you do not need their help. You can do this on your own!

Here is how you do it:

1. Subscribe to your own mod, then unsubscribe. Keep doing this until you've done it at least 25 times.
   
2. Remember to give the mod a thumbs-up vote, as it must have an overall positive rating.
   
3. Now start up your game to get the achievement :)

Why did that work? The game only counts the number of people that have subscribed to the item. They do not have to be unique!