A pack of four cats: Calico, Scottish Fold, Black Cat, and Munchkin. All 18 animations included. Requires the free base app.

Four popular cat breeds are coming to Sill Cats.<ul class="bb_ul"><li>Calico — the familiar white, brown, and black tricolor. Japan's beloved sweetheart, said to bring good luck</li><li>Scottish Fold — adorably folded ears and a perfectly round face, with certified healing powers</li><li>Black Cat — a glossy black coat and golden eyes. Looks cool, but is secretly a cuddle bug</li><li>Munchkin — watching it toddle around on short little legs will make you smile before you know it</li></ul><img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4890190/extras/818427444b0b519555ffac38763217fa.avif?t=1783600387" width=1500 height=820 />All four breeds come with 18 animations each — walking, running, sitting, sleeping, and more. Just like the cats in the base Sill Cats, they spend their days on your desktop however they please.<h2 class="bb_tag" >How to Use</h2>After purchasing this DLC, you can select the new cats from the Sill Cats settings screen. The settings screen opens from the Sill Cats icon in the Windows system tray. If you can't find the icon, click the “^” button at the bottom right of your screen to show hidden icons.<h2 class="bb_tag" >Please Note</h2><ul class="bb_ul"><li>This DLC adds new cat looks and breeds to choose from.</li><li>It does not increase the maximum number of cats shown on screen at once.</li><li>The free base app Sill Cats is required to use this DLC.</li></ul>

Sill Cats - Cat Pack 3

Four slightly mysterious Halloween-exclusive breeds, arriving October 2026. Add to your wishlist to get notified at launch. Requires the base app (free).

<h2 class="bb_tag" >Coming October 2026 🎃</h2> Four slightly mysterious new friends are joining Sill Cats. <ul class="bb_ul"><li>Skeleton — fluffy right down to the bone, a kitty you'll want to hug tight </li><li>Wizard — a playful magic apprentice who really pulls off that pointy hat </li><li>Angel — softly glowing wings and an air of mystery </li><li>Butterfly — fluttering on butterfly wings, as if it stepped straight out of a dream</li></ul> A Halloween-exclusive theme pack. Add it to your wishlist now and you'll be notified the moment it launches. Requires the base app Sill Cats (free).

Sill Cats - Halloween Pack

An upgrade DLC that unlocks a soccer ball selectable from 9 designs and lets you show up to two on screen at once. The more balls there are, the livelier your cats' play becomes.

Give your cats a more stylish ball to play with.This is a paid DLC that expands the soccer ball play. In the free version you get just one simple ball, but installing this DLC unlocks the following two things.<h2 class="bb_tag" >9 Ball Designs</h2>From the classic soccer ball and beyond, pick whichever ball you like from nine designs. Switch them to suit your mood or the look of your desktop.<img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4854110/extras/ef5e54f55ec9471167b02173ccc21ae6.avif?t=1782414540" width=1280 height=720 /><h2 class="bb_tag" >Show Up to Two Balls at Once</h2>You can now place two balls on screen at the same time. With more balls around, your cats get even livelier. Two cats might each chase their own ball, or both pile onto a single one — a wonderfully lively scene.<video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4854110/extras/b97f98dfed28c5bde289ea98d6d978f8.poster.avif?t=1782414540" width=1000 height=400 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4854110/extras/b97f98dfed28c5bde289ea98d6d978f8.webm?t=1782414540" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4854110/extras/b97f98dfed28c5bde289ea98d6d978f8.mp4?t=1782414540" type="video/mp4"></video>As always, the balls move with natural rolling, bouncing, and spinning driven by the physics engine, and the cats chase after them on their own and roll them around with their bodies. You can also grab and throw them with your mouse.* The base app “Sill Cats” is required. You can switch the type and number of balls shown at any time from the settings screen.

Sill Cats - Soccer Ball

A new toy joins Sill Cats: national flags. Place one anywhere on your desktop and the cats gather to play around it — or ignore it depending on their mood, just like cats. To start, we've added the flags of the nations in the soccer world tournament. Raise your favorite and liven up match season!

<img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4852410/extras/c0b6964eccbb8c04d8c4212414569aca.avif?t=1782414492" data-big-src=https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4852410/extras_big/c0b6964eccbb8c04d8c4212414569aca.avif?t=1782414492 width=1560 height=878 /><h2 class="bb_tag" >Bring the world's flags to your desktop</h2>Buy this DLC to plant and display national flags right on your desktop. Cats take an interest in the flags you set up, gathering around to play near them (or ignoring them completely if they're not in the mood). We plan to keep adding more flags little by little. <h2 class="bb_tag" >Flags that cats gather around</h2><ul class="bb_ul"><li>Plant them, gather them, play — Set a flag on your desktop and the cats come over to play around it however they please.</li><li>Whimsical reactions — They won't always pay attention. Whether they care is up to the cat's mood — the same Sill Cats as always.</li><li>The world's nations, all together — Includes the flags of the nations competing in the soccer world tournament. </li></ul><video class="bb_img" autoplay muted loop playsinline crossorigin="anonymous" poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4852410/extras/b9df2e642a3a636d02c1f758041ea288.poster.avif?t=1782414492" width=232 height=368 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4852410/extras/b9df2e642a3a636d02c1f758041ea288.webm?t=1782414492" type="video/webm; codecs=vp9"></video><h2 class="bb_tag" >Supported languages</h2>This DLC follows the supported languages of the Sill Cats base app.* A free copy of the base app, Sill Cats, is required to use this DLC.

Sill Cats - National Flag Set

Give your cats some toys! More kinds of toys are planned for the future. We're starting with a soccer ball and a cat flag — try placing a rolling ball your cats will love, or a cute flag, anywhere on your screen.

<img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4824710/extras/aa244ff3beb90db70e4d3545286724b3.avif?t=1782414566" width=960 height=540 /><h2 class="bb_tag" >Give Your Cats Toys</h2>Download this DLC and you can give your cats toys to play with. For now it's just a soccer ball and a flag, but we plan to add more kinds of toys little by little. <video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4824710/extras/d4ef59c145c537e90032e6803dd316c9.poster.avif?t=1782414566" width=760 height=360 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4824710/extras/d4ef59c145c537e90032e6803dd316c9.webm?t=1782414566" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4824710/extras/d4ef59c145c537e90032e6803dd316c9.mp4?t=1782414566" type="video/mp4"></video><picture><source srcset="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4824710/extras/0ec374233feb29ef546b5b76ba3fe0a9.gif?t=1782414566"><img src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4824710/extras/0ec374233feb29ef546b5b76ba3fe0a9.poster.avif?t=1782414566" class="bb_img" /></picture><h2 class="bb_tag" >A Soccer Ball Cats Can't Resist</h2><ul class="bb_ul"><li>Spot it, approach it, kick it — When a cat notices the ball, it walks or runs over and gives it a swat with its front paw.</li><li>Whimsical reactions — They won't always play with it. As always in Sill Cats, it all comes down to the cat's mood.</li><li>Scales with your cat — The ball's size adjusts naturally to match the cat size you've set.</li></ul><h2 class="bb_tag" >Plant a Flag, Make a Cat Playground</h2><ul class="bb_ul"><li>You can plant a cute cat flag anywhere on your screen.</li><li>Cats might play with the flag when the mood strikes.</li><li>The paid version lets you choose flags with national-flag designs.</li></ul><h2 class="bb_tag" >Completely Free</h2><ul class="bb_ul"><li>This DLC is completely free.</li></ul><h2 class="bb_tag" >About the Settings</h2><ul class="bb_ul"><li>You can turn it off in the settings whenever you don't want it.</li><li>Right-click the icon in your system tray and adjust it from the menu.</li></ul><h2 class="bb_tag" >Supported Languages</h2>This DLC follows the supported languages of the Sill Cats base app.* The free base app “Sill Cats” is required to use this DLC.

Sill Cats - Basic Toy Pack

Add 6 new cat appearances to Sill Cats, from shorthair cats to fluffy longhair cats. Includes 18 animations. Requires the free base app.

This DLC adds 6 new selectable cat appearances to Sill Cats. From shorthair cats to fluffy longhair cats, you can welcome your favorite cats to your desktop to match your mood. <img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641710/extras/89851663b1d009be89185ca8e9ffa472.avif?t=1782414643" data-big-src=https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641710/extras_big/89851663b1d009be89185ca8e9ffa472.webp?t=1782414643 width=1560 height=878 /><h2 class="bb_tag" >Included cats</h2> <ul class="bb_ul"><li>Grey Tabby — A friendly grey tabby. A calm-looking shorthair cat. </li><li>Siamese — A shorthair cat with an elegant face and distinctive point colors. </li><li>Blue Longhair — A longhair cat with a beautiful bluish-grey coat and a relaxed impression. </li><li>Orange Siamese Longhair — A longhair cat with a Siamese-like look and warm orange colors. </li><li>Orange Tabby Longhair — A classic orange tabby. A bright and friendly longhair cat. </li><li>White Longhair — A refined longhair cat with a fluffy pure-white look.</li></ul><h2 class="bb_tag" >Animations</h2> <video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641710/extras/3456798f55853710258af365ccf16f31.poster.avif?t=1782414643" width=1094 height=520 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641710/extras/3456798f55853710258af365ccf16f31.webm?t=1782414643" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641710/extras/3456798f55853710258af365ccf16f31.mp4?t=1782414643" type="video/mp4"></video> All 6 cats include 18 animations, such as walking, running, sitting, and sleeping. Just like the cats in the base Sill Cats app, they spend time freely on your desktop.<h2 class="bb_tag" >How to use</h2> After purchasing this DLC, you can select the added cats from the Settings screen in Sill Cats. You can open the Settings screen from the Sill Cats icon in the Windows system tray. If you cannot find the icon, click the “^” button in the lower-right corner of the screen and check the hidden icons.<h2 class="bb_tag" >Please note</h2> <ul class="bb_ul"><li>This DLC adds selectable cat appearances and types. </li><li>It does not increase the maximum number of cats displayed on screen at the same time. </li><li>The free base app Sill Cats is required to use this DLC.</li></ul>

Sill Cats - Cat Pack 1

Four bobtail cat breeds with cute short tails join Sill Cats. Includes 18 animations. Requires the free base app.

This DLC adds 4 new selectable bobtail cat appearances to Sill Cats. Welcome cats with cute short tails to your desktop. From calm patterns to distinctive spotted looks, enjoy the unique silhouettes of bobtail cats. <img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641720/extras/ee809833a102127341118d467eef2f5f.avif?t=1782414618" width=1500 height=820 /><h2 class="bb_tag" >Included cats</h2> <ul class="bb_ul"><li>Black and White Bobtail — A tuxedo-style bobtail cat with clear black-and-white contrast. </li><li>Brown Tabby Bobtail — A friendly bobtail cat with warm brown stripes. </li><li>Mekong Bobtail — An elegant-looking bobtail cat with point colors and a short tail. </li><li>Orange Spotted Bobtail — A bright and distinctive bobtail cat with eye-catching orange spots.</li></ul><h2 class="bb_tag" >Animations</h2> <video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641720/extras/c6094c9fe8ff6067d6157f90fcbc67c5.poster.avif?t=1782414618" width=856 height=622 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641720/extras/c6094c9fe8ff6067d6157f90fcbc67c5.webm?t=1782414618" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641720/extras/c6094c9fe8ff6067d6157f90fcbc67c5.mp4?t=1782414618" type="video/mp4"></video> All 4 cats include 18 animations, such as walking, running, sitting, and sleeping. Just like the cats in the base Sill Cats app, they spend time freely on your desktop.<h2 class="bb_tag" >How to use</h2> After purchasing this DLC, you can select the added cats from the Settings screen in Sill Cats. You can open the Settings screen from the Sill Cats icon in the Windows system tray. If you cannot find the icon, click the “^” button in the lower-right corner of the screen and check the hidden icons.<h2 class="bb_tag" >Please note</h2> <ul class="bb_ul"><li>This DLC adds selectable cat appearances and types. </li><li>It does not increase the maximum number of cats displayed on screen at the same time. </li><li>The free base app Sill Cats is required to use this DLC.</li></ul>

Sill Cats - Cat Pack 2

Little cats have moved into your desktop. They stroll along the tops of your windows, pounce on your cursor, curl up somewhere to sleep, and suddenly take off running at 2 in the morning. Enjoy their delightfully cat-like behavior. Welcome two breeds for free.

<h1>Roadmap</h1>We have the following updates planned for the future. [Feature Additions]・New cat toys・New cat behaviors・New cat breeds・The ability to name your cats・An entrance animation when Sill Cats starts up・The ability to pet your catsand more* Planned content may change depending on the state of development. * More detailed plans are announced on the board in the Community Hub. <h1>About the Game</h1><h2 class="bb_tag" >About This Game</h2>Sill Cats is a stay-on-your-desktop app where little cats move in and make themselves at home.They stroll along the tops of your open windows, curl up and doze off in some quiet corner, and perk up to say “what's that?” whenever your mouse moves. At 2 in the morning they might suddenly tear across the screen at full speed—yes, they get the zoomies, just like the real thing. If you've ever had a cat, you'll know exactly what we mean.<img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641700/extras/ef20794d671c94290e638c2a3f7789fd.avif?t=1783600163" data-big-src=https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641700/extras_big/ef20794d671c94290e638c2a3f7789fd.avif?t=1783600163 width=1560 height=878 /><h2 class="bb_tag" >What These Cats Are Like</h2><ul class="bb_ul"><li>Your windows are their walking trail — they take a leisurely stroll along the top edges of your open apps</li><li>Window to window with a hop — they explore your workspace however they please</li><li>Endlessly curious about your cursor — when the mouse moves, they might quietly creep closer… or might not</li><li>Click to play with them — one click to get their attention, two to get a reaction, three and they might actually play along</li><li>Their mood changes with the time of day — liveliest at dawn and dusk, lazy and sprawled out at midday (that's what &quot;crepuscular&quot; means)</li><li>Late-night zoomies — a sudden dash between 1 and 4 AM; consider yourself lucky if you catch it</li><li>Plenty of room to roam — no matter how many monitors you have, every one of them becomes their walking trail</li><li>They usually stay out of your way, but every now and then they'll pounce on your cursor. Cut them some slack on that—they're cats.</li></ul><video class="bb_img" autoplay muted loop playsinline crossorigin="anonymous" poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641700/extras/cc9c1b73af5350d07394d35a3f3898b0.poster.avif?t=1783600163" width=868 height=369 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4641700/extras/cc9c1b73af5350d07394d35a3f3898b0.webm?t=1783600163" type="video/webm; codecs=vp9"></video><h2 class="bb_tag" >Welcome Two Cats for Free</h2>Sill Cats is free to start. The first two you can welcome in are a sleek Abyssinian and a dapper Tuxedo. If you take a liking to them, you can grow the family with breed packs. Even just deciding which one to bring home next is part of the fun.By default, one cat appears on screen. If you'd like to welcome two at once, right-click the Sill Cats icon in the Windows system tray and choose from the menu.<h2 class="bb_tag" >About Additional Cats</h2>Purchasing DLC adds more cat looks and breeds to choose from.<ul class="bb_ul"><li>Cat Pack 1 — Adds 6 cats, including shorthairs and longhairs.</li><li>Cat Pack 2 — Adds 4 bobtail cats with their signature short tails.</li></ul>DLC adds more cat looks and breeds to choose from. It does not raise the maximum number of cats that can appear on screen at once.<h2 class="bb_tag" >How to Set Things Up</h2>Changing the cat breed, quitting the app, and adjusting various settings are all done from the Sill Cats icon in the Windows system tray.Right-click the Sill Cats icon to open the settings menu.If you can't find the icon, click the “^” button at the bottom-right of the screen to check for hidden icons.Up to two cats can be shown at once.* If you find a bug, we'd be very grateful if you'd report it on the board in the Community Hub.