Top similar games like IDLE PET UFO:

Raise and hatch eggs in this idle breeding simulation. Collect various types of SlimeMonster, also known as "Slimeon," and complete your collection!

This is a group of cute little fish swimming leisurely at the bottom of the screen while you work. The fish swim, grow and earn stars for you. Use them to buy other cute little fish until the bottom of the screen becomes a colorful ocean world! Start a leisure desktop fish farming journey!

A desktop hunting game. Catch tiny creatures that appear on your desktop, bring them to your peaceful garden 🏝️ Take care of them as they grow, evolve, and fill your space with quiet cozy life.

Turn every keystroke into a thriving ocean! Nano Reef is a cozy companion game where typing or clicking earns gold—without interrupting your work. Spend gold to buy marine fish, vibrant corals, and decorations, or feed your fish to interact. Build your unique, relaxing desktop aquarium!

Relaxing, cozy and slow paced farm simulator where you collect creatures and build your own ranch. Seekers keep you company while you work, study or just chill on your PC. Collect Orbs to get eggs which hatch new creatures. Decorate the shrine with trees & plants, which offer food for your Seekers.

An idle game about collecting moths.

Joyquarium is a relaxing casual fish-raising game. Buy various cute fry and sell them at a high price after they grow up. With the money you earn, you can purchase aquatic plants, driftwood, scenery stone, etc. to decorate your tank (you can freely adjust the color, size, and position).

Cozy Littlequarium is a relaxing aquarium simulator that sits at the bottom of your screen! Take care, breed them, collect and decorate!

An idle desktop aquarium game where you buy, feed, and breed fish to discover new species with unique rarities and tiers. Decorate cozy tanks and customize your desk with cute items. Earn money just by caring for your fish, even while you work or relax!

Cats are Money is a cozy idle game in the "Tamagotchi" genre where you manage a farm and collect unique cats into your collection. Take care of your pets, feed them, and play with them. Upgrade your farm, unlock new breeds and businesses.

"Skytopia" is a charming pixel-style fishing simulation idle game. Decorate a beautiful sky island at the base of your desktop, immerse yourself in a relaxing fishing lifestyle, and hatch and nurture a variety of adorable animals on the island.

SOL - Focus Companion is a cozy productivity app and game! Set in a post-apocalyptic world, help Sol the automaton and their axolotl-like companion Des re-wild their world by completing tasks in yours. As you make progress, discover what happened to the world and meet some friends along the way.

Plant seeds, pull weeds and sell vegetables - all while doing something else!

Whimsy Koi is a cozy idle game where you manage calming koi ponds. Collect various whimsical koi fish and decorate your ponds however you want. Just relax and enjoy the tranquil experience.

This is a desktop idle game. Camellia toils in any screen corner. Her land holds magic, with vibrant crops sprouting endlessly. Collect 100+ varieties—the rarer the crop, the more gold you earn. Save coins for tools or outfits. Working or relaxing, she brings you a soothing experience.

Hatch mystery eggs, watch fish grow to reveal their hidden rarity, and collect the rarest ones in a cozy aquarium you can relax with in the background.

Plantabi is a chill sandbox game where you take care of adorable plants and design the cozy little garden of your dreams!

An idle pet-collecting clicker game that keeps you company at the bottom of your screen. Click your egg to help it hatch. Grow your collection of pets to unlock upgrades and rarer eggs. Relax to chill Lofi music while you play at your own pace. Will you hatch the shiny variant of each pet?

A cozy desktop idle game where cute slimes bounce around your tiny farm while you work or study.

Collect over 100 stylish little pets on your desktop! They can freely move along the bottom of your screen, or live in the little houses you've carefully decorated for them. Hmm... or perhaps send them on adventures to earn treats?

“Work... or Fish?” is a cozy idle fishing game that runs on your desktop. The cat took a long vacation to enjoy peaceful fishing—will you join? Shrink the window to fish in secret, upgrade gear, and relax in your own little corner.

Relax and collect over 500 unique molluscs in this cozy idle game. Watch larvae grow into stunning adults in real-time, customize vibrant aquatic habitats across 9 themed packs, and discover rare species from garden snails to deep-sea cephalopods.

A creature collection game that sits at the bottom of your screen & fits easily into your routine. Whether you're working, studying, or relaxing, Whimside is always ready to offer you a cozy escape. Capture rare creatures, create new species & decorate your whimsical space!

Birdfull is a small relaxing idle game. Attract birds with feed, try to keep them longer, and discover all of them including the unique ones! Watch the birds, generate more eggs in real time, and customize your cozy bird space.

"Lofi Aquarium" is a gamified focus tool designed to enhance concentration and relieve stress. As you work, a group of adorable baby fish will keep you company, all set to soothing lofi music. Over time, the fish grow and can be sold for profit. 

Nimikins is a cozy idle gacha game with zero microtransactions. Collect adorable Nimikins and discover rare, shimmering color variations as you reunite them with their goddess, Aerie. Craft accessories to grow their strength and express your unique personality.

Dive into a simple yet charming world where curious Whomers creatures dig, eat, and survive in a compact 64x64 grid. This minimalistic simulation offers a peaceful experience of watching and interacting with small digital beings as they go about their lives

This game is about fishing with your cat, surrounded by the sounds of nature. Just hang out with your cat and you will get a new cat at regular intervals. You can earn Paw Points by petting the cat or convert the cat you have into Paw Points to get a new cat.

In Hungrities, you will take care of small and adorable creatures while attracting new visitors who will explore your farm! Play and interact with your cute creatures: drag them, squeeze them, or stop them if they start fighting each other. Have fun while expanding your collection!

Mushrooms of all kinds—adorable, quirky, and even some with unique abilities—are spring up randomly on your computer! Collect and nurture them, then decorate with various objects to create your own cozy mushroom haven, keeping you company while you work, study, or simply unwind.

Summon and study witches’ familiars in this charming creature collection game. Gather dragons, spirits and more in your quest to complete your magical grimoire. Watch them enchant your screen without intruding while you work, study or relax. With over 100 variations there’s a favourite for everyone!

Animal Workforce: Idle Tycoon Clicker is a simple and laid-back game that’s easy to jump into. Perfect for casual play, it lets you unwind and progress at your own pace, all while collecting rewards and achieving upgrades. There are also plenty of easily obtained Steam Achievements!

Decorate your own aquariums and care for a variety of fish in Fishlets, a cozy fish-collecting sim! Feed, breed, sell, and collect fish and aquatic critters in the virtual tanks mode. Drop into Adventure mode and progress through 7 unique levels, unlocking even more fish while fending off threats!

Farmer Cats is a relaxing casual simulation game featuring cute cats that can farm, fish, and build.

Help the cat fairies to arrange resources, produce and harvest crops, and manage the farm. The more efficiently the farm grows, the richer your pockets become. Show some clicking skills to unwelcome visitors who occasionally appear on the farm.

Chillquarium is a cozy and relaxing idle game. Buy fish and raise them in real time, then sell them to turn a profit! Customize your aquarium as you progress from a simple starter tank to your dream setup by filling your collection with rare exotic fish and ultra-rare color variants!