Slime Card Collection is a Roblox idle game where you buy card packs, reveal Slime Cards, and grow your binder. The more new cards you find, the more money you earn per hour — even while you are offline. This guide covers how to get started, how to earn money faster, and what to do with special cards.
In shortThe core loop is simple: spend money on packs, open them, and repeat.
Everything in this game flows from buying and opening card packs. Each pack you open gives you a handful of Slime Cards, and discovering a card you have never owned before raises how much money you earn over time. Your binder is where all your collected cards live.
Buy a packspend your in-game money at the pack shop.
Open the packreveal the Slime Cards inside.
Check your bindersee which cards are new and confirm your income went up.
Spend your earningstake the money you have accumulated and buy the next pack.
Your income rises every time you add a card to your binder that you did not have before. Money also builds up while you are offline, so logging in regularly and spending what has accumulated keeps the cycle moving.
Tips worth knowing
Log in regularly to collect the money that has built up while you were away.
Pour your offline earnings back into packs to keep momentum going.
03Live and upcoming eventsEvents
Events running now or coming soon. They have fixed dates, so check them first.
Live now –
Special Cards
👑 NEW Special Cards! Super rare unique cards that always earn MORE than your best card.
🎲 Every Special rolls a bonu…
In shortThe game has trading, but scams are possible, so check everything before you confirm.
You can trade cards with other players. Before agreeing to any deal, confirm exactly which cards are moving in each direction and make sure the other player is someone you can trust. Never share your account details or personal information with anyone during a trade.
Worth watching out for
Verify the specific cards being exchanged before you accept anything.
Never give out your account password or personal information to a trading partner.
05
Free-to-play and idle mechanics
Summary
In shortThis game is designed so that players who spend no real money can still fill their binder at a steady pace.
Every card pack in the game can be purchased with in-game money, so you are never locked out of progress by a paywall. The offline income system means your earnings continue to accumulate even when the game is closed.
Packs purchasable entirely with in-game money, no real-money purchase needed.
Offline income money accumulates automatically even when you are not playing.
06
Redeem codes and updates
Check
In shortFollowing the developer is the most reliable way to catch new codes before they expire.
The developer releases special redeem codes from time to time that give in-game bonuses. Codes can expire, and each code works only once. As of September 30, 2026, this site was tracking sixteen working codes, which it inserts automatically on the codes page.
Follow the developer on Roblox to get notified when new codes go out.
Redeem any new code promptlythey can expire and each code works only once.
Check this site's codes page for the current list of working codes.
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Slime Card Collection
Glossary
Glossary
Card Pack
An item you buy with in-game money that reveals several Slime Cards when opened.
Binder
The collection where all your cards are stored; finding new cards here increases your hourly income.
Void Card
A special card that can be sent to PSA for grading, which grants a massive income bonus.
PSA Grading
The in-game process of submitting a Void Card for evaluation, resulting in a plus ten thousand percent income boost.
Offline Income
Money that the game generates automatically while you are not logged in.
Redeem Code
A code released by the developer that you enter in-game to receive a bonus; each code works only once.
Common questions
FAQ
Does money keep building up when I am not playing?
Yes. The game generates money automatically while you are offline.
What is the biggest single income boost I can get?
Grading a Void Card at PSA adds plus ten thousand percent to your income.
Can I finish the game without spending real money?
Yes. Every card pack can be bought with in-game money, and offline income keeps that money growing even when you are away.
How do I find out about new redeem codes?
Following the developer on Roblox is the most direct way to hear about new codes. You can also check this site's codes page, which lists the codes currently confirmed to be working.
Updated Sep 30, 2026
Game updates can change what is on this page. If you spot something, get in touch and let us know.