Welcome to my guide of Steam badges organized by color and theme. This guide began as something quite small when created in 2017, but with updates throughout the years it has evolved to the 3000+ badges it has now. I'll continue to keep this guide updated with any badges I think will make a great addition.
If you have any suggestions for new categories or badges to be added, feel free to message me or leave a comment below (my replies may be infrequent, but I do read them all).
　
　
Without further ado, onto information about badges and anything else that may be useful to know before crafting. The layout of all the badges featured in this guide is the following:

 Badge image

月球坠落时
Moon Fall,
Foil badge

Game,
Level of badge

To craft a badge that you like, you will need to obtain the trading cards of the game the badge is from. Trading cards can either be bought from the Community Market or earnt as drops when playing the game. If you are looking for a more detailed understanding of trading cards and badges, I recommend reading this guide.

Please double-check the badge you want before purchasing any trading cards. This will include:

　⋄　Checking the game title of the badge (some game titles have very little to differentiate them,
　　  so I advise to take care when reading).
　⋄　Checking the level, or whether the badge is a foil or not.


If the badges you intend to craft are simply for a showcase or to be displayed as the featured badge then the section below can be skipped. On the other hand, if you wish for the four badges featured on the right of your profile (these are the most recently crafted badges) to not be interrupted or replaced soon, I recommend ensuring none of the mentioned badges below will affect this.

Community
Leader

Years of
Service

Game
Collector

This is obtained by completing all Steam community tasks. If not complete, you will have a variation of the badge called Pillar of Community or Community Ambassador. This is dependant on the number of community tasks you have completed so far.
You can click here as a shortcut to check the progress of your badge. I recommend completing all tasks (and thus the badge) before crafting, just to ensure that if you complete a community task in the future that the badge will not resurface.

For the yearly anniversary of when your Steam account was created, you'll receive a different iteration of the Years of Service badge. You can check the date you joined Steam by viewing this badge here. If your account is under a year old, you will not yet have this badge.
If you are close to receiving your next Years of Service badge, I recommend crafting the badges you want after that has occurred. This will keep your hand-picked badges remaining as the most recent four.

Every time you purchase a game on Steam, this badge will resurface to be your most recent badge (free-to-play games and DLCs do not affect this).
This is something to keep in mind if you are crafting four badges to be displayed in the most recent badge slots on your profile.
There are different variations and levels of the Game Collector badge based upon how many games you have purchased. All of the levels are included in this guide here.