Steam cards and badges are only available on Valve’s digital system, so if you purchased the game on GOG.com, you will not be able to access them.
The descriptions of Steam cards and badges are best summarized in the system article, so I will copy what you read there.
What are Steam Trading Cards?
Steam Trading Cards are collectible cards you get by playing games on Steam. Collect a set of cards to earn items that help you customize your profile and show off your gameplay.
How can I get trading cards?
You can get trading cards simply by playing one of the participating games (example: Cossacks 3). As you play, you’ll occasionally receive trading card drops which will be placed in your Steam Inventory.
Is there a limit to how many trading cards can drop?
Most games will drop a number of cards equal to about half the number of cards in that game’s set of cards. For example, Half-Life 2 has 8 cards in its set, you can receive 4 card drops by playing it. You’ll need to collect the other half of the set from other community members. Try the beta group discussions, community market, barter with friends, and trade discussions. You can check how many drops you have remaining on your badges page.
What is a badge?
A badge is an icon on your profile (and tied to your account) that represents the trading card sets you’ve collected or your participation in an event.
How do I craft a badge?
From your Profile page, click on the “Badges” link near the top of the right column or select “Badges” from your persona name drop down in the Steam menu. From your Badges page, the “Badges in Progress” tab will show which badges are ready to be crafted. Select a ready to craft badge to view its details and click on the blue “Craft a Badge” button.
What do I get when I craft a badge from my Trading Cards?
In addition to getting the Game Badge itself, you’ll get:
- a random emoticon item created for this game, that can use in chat or discussions;
- a random profile background item created for this game, that can use on your Steam Community profile
- a chance to get a discount coupon for a different game or DLC
- 100XP, which may increase your Steam Level
If your Steam Level increases, the limit on the size of your friends list will be increased by five, and potentially you’ll unlock the ability to customize your profile with showcases.
Can I upgrade my game badge?
If you gather another complete set of trading cards for the same game you can upgrade that game badge. You can craft a set for the same game at most five times. Each time you upgrade the game badge you’ll get an extra 100XP, as well as upgrading the image and title of the badge.
Randomly get emoticons:
Randomly get Steam wallpapers: