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Summer Islands

Summer Islands

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.

Released Jan 25, 2025 Developer Marttalin Games Platforms Windows · Linux BuildingEconomyStrategyProcedural GenerationCapitalism
View on Steam ↗ $14.99 (US · as of 2026-05-15)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-26.

81.1%positive196 reviews
Recommended · 2 found this helpful

“New Review: So I had a lovely discussion with the developer, and went through a play of the campaign with him alongside. He showed me a few things that were not immediately obvious in the playthrough, and were not taken into account on the tutorial video in the game. With this…”

— a player, Steam review · 35 hrs played
Not recommended · 1 found this helpful

“Game full of bugs sometimes cant even join a server or host a server, after a few minutes it random crash, or laggy. Please Optimize your game and debug it”

— a player, Steam review · 28 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. History through 2026-08 via SteamCharts; self-collected from the Steam API since Aug 2026.

30all-time peak
0 10 20 2020 2021 2022 2023 2024 2025 2026 No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period 10 avg · Jan 2025

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.

38achievements
3.2%median completion
0.1%rarest: 1.000.000 Tourists
26.3% of players 25.2% of players 23.1% of players 23.0% of players 22.2% of players 20.7% of players 16.7% of players 16.5% of players 13.2% of players 10.4% of players 9.7% of players 8.4% of players 8.3% of players 6.2% of players 5.5% of players 5.3% of players 5.0% of players 3.9% of players 3.3% of players 3.2% of players 2.6% of players 2.6% of players 2.6% of players 2.3% of players 1.4% of players 1.1% of players 0.9% of players 0.9% of players 0.8% of players 0.7% of players 0.6% of players 0.6% of players 0.4% of players 0.2% of players 0.2% of players 0.1% of players 0.1% of players 0.1% of players 26.3% 0% most earned rarest
Almost everyone has
26.3%25 Mio € — 25 Mio € on your account
25.2%Business Survivor — You have held out until the award ceremony
23.1%1.000 Tourists — 1.000 tourists in your paradise
Rarest badges of honor
0.1%1.000.000 Tourists — 1.000.000 tourists in your paradise
0.1%800.000 Tourists — 800.000 tourists in your paradise
0.1%600.000 Tourists — 600.000 tourists in your paradise

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Aug 14, 2026
Update 08.2026

🌴 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 new

Jun 01, 2026
Summer Islands Update 1.0.5

🌴 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

Mar 28, 2026
Summer Islands Update 1.0.4

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 abou

Jan 17, 2026
🌸 Spring Is Almost Here – Summer Islands Update!

🌸 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 pre

Dec 25, 2025
Blog post: Christmas 2025

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

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Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-26.

GenresCasual, Indie, Simulation, Strategy
Player tagsBuilding · Economy · Strategy · Procedural Generation · Capitalism · Casual · Management · Pixel Graphics · Retro · Simulation · Multiplayer · Real Time Tactics (SteamSpy community voting)
FeaturesSingle-player · Multi-player · PvP · Online PvP · LAN PvP · Co-op · Online Co-op · LAN Co-op
LanguagesGerman * , English * , Spanish - Spain * , French, Italian, Arabic, Portuguese - Brazil, Traditional Chinese, Simplified Chinese, Japanese, Korean, Polish, Russian, Turkish, Ukrainian, Swedish *
ControllerFull support
Achievements38
Official sitehttps://SummerIslands.Marttalin.de/
Minimum system requirements (PC)

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