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Watch trailer on Steam ↗Summer Islands
Marttalin Games · Published by Marttalin Games · Official site ↗
Very Positive — 81% positive (196 reviews) · 38 achievements
Last updated 27 Sept 2026
Summer Islands is a holiday real-time strategy business simulator. Be the right businessman, build your holiday paradise and grab the money from your tourists. Play alone, with your friends and with computer enemies and survive natural disasters without going insolvent.
£12.79
Lowest price we've ever recorded
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Price history
Indie, Simulation, Strategy, Casual · 2025 · More £5 - £15 games
Manage your holiday resort's success in Summer Islands, a real-time strategy simulation where your decisions shape tourist satisfaction and profits. Compete with AI opponents while weathering natural disasters to thrive on the Summer Islands.
About this game
Create almost infinite numbers of maps with different seeds. One island, several or the Summer Islands mode. From small 100x100 maps up to 1500x1500 maps. From high mountains or just sand islands. Everybody finds his small island in the wide ocean or in the big archipelagos.
Build cabins, villas or expensive hotels directly on the beach or in the mountains. When a building is finished, tourists can come by boat or plane. The tourists want to be preserved. Build bars, discos, golf courses, supermarkets and many other buildings that are popular with tourists and will make you rich as the owner.
Buy new buildings from a wide range of building types. From houses and hotels to restaurants, stores, parks attractions etc. Here you can distinguish between mass tourists and luxury tourists. Buildings with luxury tourists earn you more money, but are expensive and have a lower capacity. Also note that mass tourists and luxury tourists have different preferences as to which buildings are nearby.
Borrow money or pay off your debts. Go out and advertise, or take out insurance. Check if your buildings are doing well and you can raise the rent. Hire consultants to protect you from sabotage, for example. Or would you rather unlock more sabotage? That is entirely up to you.
Unfortunately there are also natural disasters that can destroy your buildings. Whether tornado, earthquake or meteorite, everything is possible.
In quiet times the competition comes from your enemy and expands over your land. Maybe there are some sabotage possibilities!
In the Map Editor you can not only create your perfect map. You can also fill it with events. Which buildings should be unlocked under which conditions. A match where you cannot build roads or there is no minimap? You want natural disasters to occur under certain conditions at a certain place? Try it out!
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 (64-bit) or newer
- Processor: Intel Core i5-2500K / AMD FX-6300 or better
- Memory: 4 GB RAM
- Graphics: NVIDIA GeForce GTX 970
- Storage: 700 MB available space
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
Update 08.2026
{STEAM_CLAN_IMAGE}/32008835/42001e0e2fa946c7da1d50f040b826f46dd48ccc.png 🌴 Update 08.2026 🌴 Hello everyone, Today, we would like to give you a small update on our current projects. This way, you can find all the important information at a glance, and we can present our news together instead of sending many individual messages. Of course, there is also a little bit of marketing involved 😉. We apologize for that and thank you for your understanding. Summer Islands Over the past few weeks, we were able to collect even more feedback. A big thank you goes to Kinichie, with whom I conducted a three- to four-hour playtest. This feedback, along with additional comments from DoKomi, your emails, and directly from the Steam forums, led me to the decision to focus intensively on fixing bugs over the next month and release an update. We still have a larger content update planned, but I do not want to wait until then to fix the existing bugs. We also want to reintroduce the tutorial level and add more campaign levels to make it easier for new players to get started. In addition, I would like to add a direct feedback button so that you can send us your feedback more easily. As already mentioned, the larger content update is still planned. The new content is closely connected to one of our new games. Since we have not released this game yet, I do not want to reveal any further information at this point. Beeing Hive This year, we will be attending gamescom with Beeing Hive. On two days, you will be able to try out the game for yourselves and test the latest features: FR, 28.08.2026: Beeing Hive – Hall 10.2, Booth D43g SA, 29.08.2026: Beeing Hive – Hall 10.2, Booth D43g {STEAM_CLAN_IMAGE}/32008835/60af9ab348caf58d08359404f84ecbba7245f2d1.jpg Since the last festival in May, the Indie Game Fest in Cologne, we have been able to implement a lot of your feedback. We have also added further content that is now part of the demo. The first level currently does a good job of showcasing the c...Read full article on Community Announcements (Matt)Patch NotesOfficial
Summer Islands Update 1.0.5
{STEAM_CLAN_IMAGE}/32008835/42001e0e2fa946c7da1d50f040b826f46dd48ccc.png 🌴 Summer Islands – Update 1.0.5 Hello everyone, with Update 1.0.5 we are fixing several minor issues and adding a new language to the game. 🛠️ Bug Fixes Fixed a performance issue where snow and leaves did not disappear properly and kept reappearing Fixed inconsistencies in building information (positive/negative effects) between the build menu, research tree, and building menu Corrected offset placement of beach houses Fixed an issue where no click effects were shown during terraforming Fixed an issue where airplanes were flying at incorrect angles 🌍 New Feature Added new language: Swedish 🇸🇪 ❤️ Thank you for your support! Thank you for playing, testing, and continuously providing feedback on Summer Islands. A larger update is already in the works. 😉 P.S.: If you like Summer Islands, please leave us some positive feedback! 🌟 A little 👍 from you means the world to us! ❤️ 🌞 Your Summer Islands Team {STEAM_CLAN_IMAGE}/32008835/208187681c271764254685118b1e36940a347538.pngRead full article on Community Announcements (Matt)Patch NotesOfficial
Summer Islands Update 1.0.4
{STEAM_CLAN_IMAGE}/32008835/42001e0e2fa946c7da1d50f040b826f46dd48ccc.png Polishing Your Islands – Update 1.0.4 Hello everyone, with Update 1.0.4, we mainly focused on many small and large issues that were affecting your experience in the game. This update is primarily about bug fixes, stability, performance, and overall polish. ⛰️ Terraforming with Undo Function We fixed several issues related to terraforming. You can now also undo changes as long as the game is paused – including a direct refund of your money. {STEAM_CLAN_IMAGE}/32008835/7c31b732428f3f53d608d7dea3c5de3eed3968f9.png 📷 Camera issues fixed After loading, the camera no longer starts somewhere in the void, but at the spot you were looking at last. Camera movement is now also more performant. 🖥️ Better display on different resolutions Issues with image centering, scaling, and special screen formats such as 3840x1200 (32:10) have been fixed. 🔠 Better readability The font was difficult to read in some places – we improved that. In addition, you can now choose a new font. {STEAM_CLAN_IMAGE}/32008835/37931669365a84329766faa9d4cc456c74dcdd60.png 📰 News banner runs more smoothly The text in the news banner now scrolls much more smoothly and less jerkily. 📊 Clearer charts The 0€ line in the money chart now always remains visible. 👤 Name is now saved Your chosen player name is now saved and will no longer be replaced by your Steam name every time you restart the game. 🧩 Many more fixes In addition, we fixed many other smaller issues and made further optimizations in various parts of the game. ❤️ Thank you for your support! Thank you for playing, testing, and giving us so much helpful feedback on Summer Islands. With every update, the island world gets a little better. We are still working on a bigger update for this year. But pssssst. ;) 🌞 Your Summer Islands Team {STEAM_CLAN_IMAGE}/32008835/208187681c271764254685118b1e36940a347538.pngRead full article on Community Announcements (Matt)Patch NotesOfficial
🌸 Spring Is Almost Here – Summer Islands Update!
{STEAM_CLAN_IMAGE}/32008835/42001e0e2fa946c7da1d50f040b826f46dd48ccc.png 🌸 A Touch of Spring 🌸 Hello everyone, Spring is almost here — and Summer Islands is getting warmer too. We’ve been working on the next update for a while, and now it’s finally time. We’re happy to present v1.0.3, featuring: {STEAM_CLAN_IMAGE}/32008835/14a61e3ce0c55427e51c4c9673b4c0ecd8b6f51a.png 🌸 More seasonal vibes (toggleable) Look forward to cherry blossoms in spring, maple leaves in autumn, and snowflakes in winter. 🏯 New special Japanese building A true highlight: a unique Japanese building that tourists will absolutely love. {STEAM_CLAN_IMAGE}/32008835/c632b3e49c73ed7b9c44496c49958c9cc47aba5f.png 📰 Dynamic news banner News is now more dynamic, clearer, and easier to read — so you can quickly see what matters without constantly clicking around. 📺 32:9 screen support Ultrawide fans, rejoice: 32:9 support is here — for more overview and more island. 💸 Buy enemies Yes, you read that right: you can now buy enemies — a new option to spice up your strategies. 🧾 Yearly report opens automatically at year’s end (toggleable) The yearly report now opens automatically at the end of the year, so you won’t miss your progress. 🆕 Accessibility options More accessibility for everyone: high contrast, bigger cursor, outlined text — so Summer Islands feels good for everyone. ⚙️ Performance improvements & engine update We’ve done a lot under the hood: engine update, optimizations, and noticeable performance improvements. 🔠 Improved umlauts (ÄÜÖ) Small but important: umlauts now look better and display more reliably. ⚡ Bugfixes, bugfixes, bugfixes And of course: a whole bunch of fixes — many small annoying issues are gone. (But don’t worry… we’ll keep sneaking in new ones so you have something to hunt for 🌞) 🌴 Thank you for being part of Summer Islands! Thanks to every single one of you for your patience — and now have fun with Summer Islands!! P.S.: If you’re enjoying Summer Islands, please, please, please le...Read full article on Community Announcements (Matt)AnnouncementsOfficial
Blog post: Christmas 2025
{STEAM_CLAN_IMAGE}/32008835/42001e0e2fa946c7da1d50f040b826f46dd48ccc.png Hello everyone, As another year comes to an end, we’d like to take a moment to say thank you. We wish you a peaceful holiday season, relaxing Christmas days, and a wonderful start to the new year. We hope you, your family, and your friends are doing well. 2025 has been a year full of great encounters, inspiring conversations, and unforgettable moments at the game festivals we attended. Meeting you in person and exchanging ideas has been incredibly motivating for us. Your feedback and enthusiasm have helped shape Summer Islands more than you might think. The next milestone is already close: Update v1.0.3 is just around the corner. At the same time, we’re busy working on several new projects behind the scenes. Our next title will be a turn-based strategy game called Streak Of Power. Alongside that, we’re developing a Summer Islands board game and a smaller creative project named BEEING HIVE. If you’d like to follow our journey, you can find us here: Steam Developer Page: https://store.steampowered.com/developer/Marttalin Newsletter & updates: https://marttalin.de/ Finally, a huge thank you for your continued support and trust. Summer Islands wouldn’t be where it is today without you. You are a vital part of this journey. We wish you all a fantastic and successful 2025 🚀 P.S.: If you ❤️ Summer Islands, we’d be incredibly happy 🤩 to receive a 👍 review! Have fun {STEAM_CLAN_IMAGE}/32008835/208187681c271764254685118b1e36940a347538.pngRead full article on Community Announcements (Matt)
