| Developer | Alder Games |  | 
| metacritic_name | League of Mermaids |  | 
| community_visible_stats | Yes |  | 
| ReleaseState | released |  | 
| Publisher | Legacy Games |  | 
| Store Release Date | 23 July 2013 – 07:00:00 UTC () |  | 
| community_hub_visible | Yes |  | 
| Primary Genre | Casual (4) |  | 
| Store Genres | Casual (4), Indie (23) |  | 
| Steam Release Date | 22 September 2015 – 17:33:24 UTC () |  | 
| Original Release Date | 23 July 2013 – 07:00:00 UTC () (1374562800) |  | 
| Store Asset Modification Time | 29 October 2019 – 22:30:09 UTC () (1572388209) |  | 
| library_assets | | library_capsule | en |  | library_hero | en |  | library_logo | en |  | logo_position ↴ |  | pinned_position | BottomLeft |  | width_pct | 56.76779463243874 |  | height_pct | 64.43837568273571 | 
 |  | 
| review_score | 6 |  | 
| review_percentage | 72 |  | 
| Steam Deck Compatibility | Steam Deck: This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons All functionality is accessible when using the default controller configuration 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: Playablesteamos_compatibility: Compatibletest_timestamp: 9 May 2023 – 00:00:00 UTCtested_build_id: 799327configuration: | supported_input | other |  | requires_manual_keyboard_invoke | 0 |  | requires_non_controller_launcher_nav | 0 |  | primary_player_is_controller_slot_0 | 0 |  | non_deck_display_glyphs | 1 |  | small_text | 0 |  | requires_internet_for_setup | 0 |  | requires_internet_for_singleplayer | 0 |  | recommended_runtime | proton-stable |  | requires_h264 | 0 |  | requires_voice_files | 0 |  | gamescope_frame_limiter_not_supported | 0 |  | hdr_support | 0 | 
 |  | 
| First seen on SteamDB | 29 June 2015 – 23:19:01 UTC (), in changelist #1138191 |  |