A Feat card is awarded to a player whenever he or she completes (feats) a collection. All Feat cards have the likeness of a Rat on them.
To view your Feat cards, go to your Vault and click the dropdown menu that says 'Active Collections' (the default Vault view), and select 'Feat Cards':
Your Vault will now display all of the Feat cards you've earned from completing collections:
While in your Vault, if you wish to view another player's Feat cards, click on the pencil icon at the bottom of the screen and type in their display name/PackRat ID, which will take you to the same part of their Vault.
Depending on how the collection was completed, there are multiple different Feat badges that can be awarded along with the Feat card itself.
Some Feat badges can be added to a collection AFTER it's already been feated. For example, let's say a player feats a collection with just one of each card and earns a Perfect Vault Badge Feat. After doing so, she can again collect, add bling to, and vault one (or more) of each card from the same collection in order to earn an all-bling Feat badge.
An All-Foil Feat Badge is awarded when each card in the collection is a Foil card; you can earn this badge after already feating a collection:
An All-Premium Feat Badge is awarded when the cards that have been collected all have a premium gold border:
An XL Feat Badge is awarded when the collection is feated after all cards have become available in XL markets:
An All-Bling Feat Badge is awarded when all the cards in the collection also have bling; you can earn this badge after feating a collection:
A Perfect Vault Feat Badge is awarded when only one of each card is vaulted. This badge can only be earned upon first feating a collection. But, Vaulting more cards (foiled cards, for example) from the same collection after the Perfect Vault Feat will NOT remove the badge, even though now there is more than 1 of each card in the vaulted collection:
A Lightning Feat Badge is awarded when you complete a collection within the first hour of its being featable; you will get back 65% of the tickets spent on the collection as a reward!
A Star Feat Badge is awarded when you complete a collection within the first 24 hours it is featable; you will get back 50% of the tickets spent on the collection as a reward!
A Diamond/Precious Feat Badge is awarded when you complete a newly-featable collection within the first week; you will get back 35% of the tickets spent on the collection as a reward!
A Cheese Feat Badge is awarded when the collection is completed while its cards are all available in standard credit markets (though not all cards have to be purchased from a standard credit market). Upon feating, you will get back 20% of any tickets you may have invested in this collection.
A heart Feat Badge is awarded when a collection is feated more than a week after it became featable, but before all cards have moved to XL markets; that is, you earn a heart feat badge if at least one of the vaulted cards was only available in a ticket market at feat time. You will get back 20% of the total amount of tickets spent on the collection.
An Autumn Feat badge is awarded when you complete a collection after it's retired; you will get back 20% of the tickets spent on the collection as a reward!
Any Feat badge that has been awarded will show up in your vault when you view a completed collection, underneath the Feat card: