Frequently asked questions

NullDen is a free collection of browser games you can play instantly, with no download and no sign-up. The games are made by third-party developers, such as Playgama and GameMonetize, and open inside the site. Browse the games.

No. You can play every game without one. A free account is optional and unlocks Nullbux, the Shop, trading, the Forums, the Players list, your avatar and a public profile. We only ask for a username and a password, never an email address.

Yes. Every game is free to play. Some games show ads, and Nullbux can never be bought with real money. If you would like to advertise on NullDen, email zzearyd@gmail.com.

Use the search box on the home page (press / on a keyboard), browse the genre rows and tap View all to see a whole category, or try Surprise me and the Game of the day. Tap the heart on a game to favorite it. Your recent games appear under Continue playing.

Yes. Many games work on touch screens. Choose the Phone-ready filter in the games list to see them. Some games still need a keyboard.

Press / to jump to search and Esc to close a game. You can see the full list in Settings under Shortcuts.

Nullbux are NullDen’s virtual currency, used in the Shop and in trades. They have no cash value, can’t be bought or exchanged for real money and aren’t your property. See the Terms.

New accounts start with 100. Claim your daily reward on the Account page: 60 on day one, rising by 10 each day of a streak up to 120. You also earn 10 Nullbux about every 5 minutes while you play, up to 300 a day. Giveaways appear as a banner at the top of the site while they run.

Open Account and choose Change avatar. Pick an emoji or an icon and a background color. Your avatar shows on your profile, in the forum and in the Players list.

Achievements unlock as you play, for example for trying 10 different games or favoriting 5. They are saved in your browser and listed in Settings.

Because we don’t collect email addresses, there is no automatic reset. Email zzearyd@gmail.com. The owner can set a new password for an account, but may ask you to prove it is yours.

Email zzearyd@gmail.com from the address you can reach us at and say which username to delete. See what we store in the Privacy Policy.

Spend Nullbux on pets, gear, treasures and fun items, or open a Mystery Crate (300) or Premium Crate (1,000) for a random item. Prices drift up or down a little each day, and three items are 25% off every day under Deals. You can sell any item back for half its current price. Open the Shop.

Items are collectibles. You can equip one from your inventory to show it off on your public profile, and you can trade them with other players.

Open a player’s profile and choose Offer a trade, or go to Trades from the Shop. Pick what you give and what you ask for, up to 5 kinds of items per side plus Nullbux. The other player can accept or decline. A trade swaps everything at once and is final. Offers expire after 3 days, and you can have 10 open at a time.

They have a private profile. You can still ask them for Nullbux, or they can send you an offer. You can make your own profile private or public under Privacy on your Account page.

Be kind. No hate, harassment, spam, personal information or links to harmful sites. Messages can be up to 240 characters, you can post once every few seconds and posts disappear after 7 days. The News channel is for managers and above. Staff can delete posts and ban accounts that break the rules. See the Terms.

Tap the flag on a forum message, or choose Report on a player’s profile or a trade offer. Reports go to staff. Please only report in good faith, because false reports can get an account banned.

They mark staff. Moderators handle reports and bans and delete posts. Managers can also post announcements and run giveaways. Admins can also adjust balances and items. The Owner runs the site.

Yes. Log in with your username and password and you will see an appeal form. Staff review every appeal and can approve or deny it.

Press Reload in the game bar and try again. Turn off ad blockers or extensions for this site, or try another browser. If it still fails, tap Report in the game bar. Games are made by third parties, so we can’t fix them from inside, but we can remove ones that are broken.

Log in, then use the Feedback link at the bottom of any page and choose Request a game. Add the game’s name or web address. You can send up to 5 feedback messages or reports a day.

Use the Feedback link at the bottom of the site and choose Bug or glitch. Tell us what you did and what happened. Never include your password.

In Settings, turn off visual effects, pick a plain background and choose a smaller card size. Closing other browser tabs also helps.

Yes. In Settings you can pick a color theme, a background, the card size and the text size. Discreet mode gives the site a plainer look with a different tab title and icon.

Yes. In Settings, use Add a game to save a game by its name and web address. It stays on your device and shows up in your list.

If you make an account, we store your username, a salted hash of your password, your Nullbux and items, your avatar and a few activity records. Your settings stay on your device. Details are in the Privacy Policy.

NullDen itself sets no tracking cookies. It uses your browser’s storage for settings and sign-in. The games and ads, including ads from Google, come from third parties and may set their own cookies. See Cookies and Advertising in the Privacy Policy.

Ads help keep NullDen free. They come from Google, other third parties and the games themselves. You can turn off personalized ads in Google’s Ad Settings or learn more at aboutads.info. See Advertising in the Privacy Policy. Please don’t click ads just to support the site. That breaks Google’s rules and can get ads switched off.

Games open in sandboxed frames with limited permissions. Never enter a password, payment details or personal information into a game, and don’t download anything a game asks you to. See Security.

You must be at least 13. If you are under 18, a parent or guardian needs to be okay with you using the site. See Terms.