Summer Islands

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App ID	731650
App Type	Game
Developer	Marttalin Games
Publisher	Marttalin Games
Franchise	Marttalin Games
Supported Systems	Windows Linux
Last Changenumber	30659304
Last Record Update	18 August 2025 – 22:14:25 UTC ()
Release Date	25 January 2025 – 13:42:28 UTC ()

❓ 73.56%

165 reviews

In-Game

+10

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.

Additional Information

Developer

Marttalin Games

metacritic_name

Summer Islands

controller_support

full

community_visible_stats

Yes

workshop_visible

Yes

ReleaseState

released

Publisher

Marttalin Games

Store Release Date

25 January 2025 – 13:42:35 UTC ()

osarch

community_hub_visible

Yes

Social Media

https://www.instagram.com/marttalingames/
https://mastodon.social/@Marttalin
https://www.youtube.com/@Marttalin

Primary Genre

Simulation (28)

Store Genres

Casual (4), Indie (23), Simulation (28), Strategy (2)

Steam Release Date

25 January 2025 – 13:42:28 UTC ()

Store Asset Modification Time

29 March 2025 – 08:27:32 UTC () (1743236852)

library_assets

library_capsule	en
library_hero	en
library_hero_blur	en
library_logo	en
library_header	en
logo_position ↴
pinned_position	CenterCenter
width_pct	100
height_pct	100

osextended

empty string

review_score

review_percentage

Detected Technologies (?)

CRIWARE SDK, Greenworks SDK, NWJS SDK, NodeJS SDK

Steam Deck Compatibility

Steam Deck:
All functionality is accessible when using the default controller configuration
This game shows Steam Deck controller icons
In-game interface text is legible on Steam Deck
This game's default graphics configuration performs well on Steam Deck
SteamOS:
This game runs successfully on SteamOS
category: Verified
steamos_compatibility: Compatible
test_timestamp: 11 June 2024 – 00:00:00 UTC
tested_build_id: 14657156

configuration:

supported_input	gamepad
requires_manual_keyboard_invoke	0
requires_non_controller_launcher_nav	0
primary_player_is_controller_slot_0	0
non_deck_display_glyphs	0
small_text	0
requires_internet_for_setup	0
requires_internet_for_singleplayer	0
recommended_runtime	native
requires_h264	0
requires_voice_files	0
gamescope_frame_limiter_not_supported	0
hdr_support	0

controllertagwizard

Yes

Early Access Release Date

21 June 2019 – 00:00:00 UTC ()

First seen on SteamDB

7 October 2017 – 08:39:00 UTC (), in changelist #3507171

Supported Languages

15 Languages	Interface	Full Audio
German	Yes	Yes
English	Yes	Yes
Spanish - Spain	Yes	Yes
French	Yes
Italian	Yes
Arabic	Yes
Portuguese - Brazil	Yes
Traditional Chinese	Yes
Simplified Chinese	Yes
Japanese	Yes
Korean	Yes
Polish	Yes
Russian	Yes
Turkish	Yes
Ukrainian	Yes

Hardware Categories

Full Controller Support

DualShock Controllers (USB Only)

DualShock Controllers

DualSense Controllers (USB Only)

DualSense Controllers

Assets

Load all asset images

clienticon

21e2a0f67b47a6498ee1e9be5628f8832d7324ef

clienttga

41d5592b645e423108ead9b286672fdd51405e16

icon

0dab054949858255a7a8961b5be9b47dba755874

logo

ae6ad4bf07966ec1c81f3ee738b0601e9f58a5ed

logo_small

ae6ad4bf07966ec1c81f3ee738b0601e9f58a5ed_thumb

small_capsule

english

234a27ef766895b6224f6ca0da37fbb6f87e5a85/capsule_231x87.jpg

header_image

english

header.jpg

library_assets_full

library_capsule ↴
image/english	1cd90dc8508aa24c33b9c45551832c7540d3dba0/library_600x900.jpg
image2x/english	1cd90dc8508aa24c33b9c45551832c7540d3dba0/library_600x900_2x.jpg
library_hero ↴
image/english	4a7c677e288b6c768a0ab0e3c303a83c03616264/library_hero.jpg
image2x/english	4a7c677e288b6c768a0ab0e3c303a83c03616264/library_hero_2x.jpg
library_hero_blur ↴
image/english	4a7c677e288b6c768a0ab0e3c303a83c03616264/library_hero_blur.jpg
library_logo ↴
image/english	34df6541436fd291e12bde4d8568907a49809140/logo.png
logo_position/pinned_position	CenterCenter
logo_position/width_pct	100
logo_position/height_pct	100
image2x/english	34df6541436fd291e12bde4d8568907a49809140/logo_2x.png
library_header ↴
image/english	f302882a34d1f3a727018522c80ef1590e31ec9c/library_header.jpg
image2x/english	f302882a34d1f3a727018522c80ef1590e31ec9c/library_header_2x.jpg

Assets

main_capsule	040df0112a3b72219846dfdda745b30899170ed5/capsule_616x353.jpg
small_capsule	234a27ef766895b6224f6ca0da37fbb6f87e5a85/capsule_231x87.jpg
header	header.jpg
page_background	page_bg_generated_v6b.jpg
hero_capsule	be9d2769771aaf2c0f1a088c8635ca78ebb90b12/hero_capsule.jpg
hero_capsule_2x	be9d2769771aaf2c0f1a088c8635ca78ebb90b12/hero_capsule_2x.jpg
library_capsule	1cd90dc8508aa24c33b9c45551832c7540d3dba0/library_600x900.jpg
library_capsule_2x	1cd90dc8508aa24c33b9c45551832c7540d3dba0/library_600x900_2x.jpg
library_hero	4a7c677e288b6c768a0ab0e3c303a83c03616264/library_hero.jpg
library_hero_2x	4a7c677e288b6c768a0ab0e3c303a83c03616264/library_hero_2x.jpg
community_icon	0dab054949858255a7a8961b5be9b47dba755874.jpg
page_background_path	app/731650
raw_page_background	page_bg_raw.jpg
timestamp	29 March 2025 – 08:27:45 UTC

Trailers

257045980 ↴
trailer_name	Summer Islands Quick Tutorial EN
trailer_category	1
trailer_480p/video/webm	257045980/movie480_vp9.webm
trailer_480p/video/mp4	257045980/movie480.mp4
trailer_max/video/webm	257045980/movie_max_vp9.webm
trailer_max/video/mp4	257045980/movie_max.mp4
microtrailer/video/webm	731650/739996/2f56b4ee2c67f9ea54065e54b067371abcd52066/1751137394/microtrailer.webm
microtrailer/video/mp4	731650/739996/2f56b4ee2c67f9ea54065e54b067371abcd52066/1751137394/microtrailer.mp4
screenshot_medium	257045980/movie.293x165.jpg
screenshot_full	257045980/movie_full.jpg
trailer_base_id	739996
all_ages	true
is_highlight	true
timestamp	1729072825
256799071 ↴
trailer_name	The Story in Summer Islands
trailer_category	3
trailer_480p/video/webm	256799071/movie480_vp9.webm
trailer_480p/video/mp4	256799071/movie480.mp4
trailer_max/video/webm	256799071/movie_max_vp9.webm
trailer_max/video/mp4	256799071/movie_max.mp4
microtrailer/video/webm	731650/308855/043a2e6dbed12b98cb5f7ce5eb572915e2121b37/1751137393/microtrailer.webm
microtrailer/video/mp4	731650/308855/043a2e6dbed12b98cb5f7ce5eb572915e2121b37/1751137393/microtrailer.mp4
screenshot_medium	256799071/movie.293x165.jpg
screenshot_full	256799071/movie_full.jpg
trailer_base_id	308855
all_ages	true
timestamp	1729072830

Depots

ID	Configuration	Size	DL.
731651	Summer Islands Content	232.12 MiB	205.59 MiB
731652	Windows "Summer Islands"-Depot-Windows	458.62 MiB	123.15 MiB
731653	Linux "Summer Islands"-Depot-Linux	545.58 MiB	128.66 MiB
731654	macOS "Summer Islands"-Depot-Mac	399.20 MiB	123.00 MiB

Total size on disk is 1.60 GiB and total download size is 580.41 MiB.

Total size on disk is 690.74 MiB and total download size is 328.75 MiB, when filtered to Windows, English, no DLC depots.

Branches

Name	Description	Build ID	Time Updated
public		18002753	6 April 2025 – 16:44:53 UTC
multiscreentest	multiscreentest	18872333	15 June 2025 – 08:18:43 UTC
v.0.9.4	v.0.9.4	14657156	7 October 2024 – 17:53:37 UTC
v.0.9.5	v.0.9.5	15998260	20 October 2024 – 13:41:54 UTC
v.0.9.6	v.0.9.6	16113266	13 January 2025 – 18:14:14 UTC
v.1.0.0	v.1.0.0	17130071	3 February 2025 – 17:26:19 UTC
v.1.0.1	v.1.0.1	17372958	27 March 2025 – 17:18:05 UTC

Other

Name	Value
baselanguages	English
workshopdepot	Summer Islands (731650)
privatebranches	1

Summer Islands

Additional Information

Supported Languages

Tags

Categories

Hardware Categories

Assets

Depots

Branches

Other