《悠久之Tierblade -悠久のティアブレイド-》是一款由日本乙女遊戲大廠Idea Factory旗下品牌Otomate開發的戀愛冒險遊戲，最初於2016年在PlayStation Vita平台推出，隨後於2025年8月7日有移植至Nintendo Switch，由Idea Factory與Design Factory製作與發行，並推出多個衍生版本。融合機械、末日科幻與戀愛要素，設定與世界觀宏大，劇情情感濃烈，是近年乙女遊戲中頗受歡迎的代表作之一。

背景設定在經歷「終末戰爭」後毀滅的未來世界。地球因戰爭與污染而變得不適合人類居住，存活者的平均壽命減少一半以上，並分散在兩個截然不同的生存環境中：一個是由AI所管理、如牢籠般的空中城市「Elysion」，另一個則是以機械兵器為主力、仍在地表上對抗異變生命體的軍事組織「Neo Sphere」。存活3000年的女主角伊芙（Eve）是Elysion裡的一名被人工智能囚禁的「特別個體」，擁有左右世界命運的關鍵力量，能淨化汙染大氣的力量。某天她在命運安排下與一台被稱為「Tierblade」的巨大機甲「Yajur」同步，從而展開一連串逃亡與抗爭的旅程，並與多位性格迥異的男主角產生深厚牽絆。

採用典型的乙女遊戲系統，以文字冒險進行，搭配分支選項影響劇情走向與戀愛發展。每位男主角都有專屬路線與結局，玩家可依據自己的選擇深入了解角色的過去、秘密與個人目標。遊戲中也融入大量機甲戰鬥與政治陰謀元素，使劇情在戀愛的同時也保持張力與深度。除了主線劇情之外，也有回憶模式、畫廊、語音收藏等乙女遊戲標準功能，提升重玩價值。

在操作上，支援觸控與按鍵操作，介面流暢簡潔，對初次接觸乙女遊戲的玩家也非常友好。每位角色皆由知名聲優擔綱演出，例如近藤隆、松岡禎丞、石川界人等，為角色注入鮮明的個性與情感，配樂則以空靈未來感的旋律為主，營造出強烈的世界觀氛圍。

在市場評價方面，普遍獲得乙女遊戲愛好者高度好評，尤其稱讚其劇情構成完整、角色塑造細膩，並且結合戀愛與科幻題材的嘗試相當成功。部分玩家認為其世界觀甚至媲美商業動畫水準，而角色之間的情感描寫亦令人感動。雖然某些劇情節奏偏慢或資訊量較大需耐心閱讀，但整體完成度與沉浸感極高，被視為Otomate在2010年代最具代表性的原創IP之一。2017年的續作《悠久之Tierblade -Fragments of Memory-》與Fan Disc也陸續推出，進一步補完角色背景與後日談內容，讓整體世界觀更為完整。

總結而言，《悠久之Tierblade》是結合末世科幻、機甲戰爭與戀愛冒險的高品質乙女遊戲，無論是對喜歡科幻故事、重劇情遊戲，或熱愛浪漫戀愛要素的玩家來說，都是不容錯過的傑作。

Yūkyū no Tierblade (悠久のティアブレイド), officially titled Tierblade of Eternal Memories, is a role-playing game released on August 7, 2025, for the Nintendo Switch. Developed and published by Idea Factory and Design Factory, it is a remastered version of the original 2016 PlayStation Vita title.

The game blends rich narrative storytelling with a strategic battle system, set in a fantasy world where magic and advanced technology coexist. Due to atmospheric pollution, humanity’s average lifespan has been drastically reduced by more than half. The story follows Shuudo, a boy from the slums, and his fateful encounter with Atarva, through which he learns about Eve, a mysterious girl who has lived for over 3,000 years and possesses the power to purify the world. Drawn into political conflicts and conspiracies of the kingdom, Shuudo embarks on a journey of self-discovery and protecting what he holds dear.

The narrative is multi-layered, with deeply developed characters. In addition to the main story, there are numerous side quests and character interactions that allow players to explore the backgrounds and motivations of various characters in detail. As the story progresses, players will face important choices that influence character development and lead to multiple endings, significantly enhancing the game’s replayability.

Gameplay-wise, the game advances through dialogue choices, which also impact the romantic development between the protagonist and other characters. It uniquely combines time-travel elements and mecha-based combat, offering both emotional depth and action-packed sequences. The art style is visually refined, with smooth character animations and immersive audio-visual design, including music and sound effects that effectively enhance the atmosphere.

In terms of reception, Tierblade of Eternal Memories has been widely praised by both players and critics since its release. Many fans commend its intricately woven story and well-crafted character development, noting that its narrative depth surpasses that of many games in the same genre. The real-time battle system has also been lauded for its fluidity and tactical complexity, making it a strong contender in the action-RPG space. However, some reviewers have pointed out that the difficulty curve and certain gameplay mechanics could be more polished, particularly for newcomers who may find the early stages a bit overwhelming.

Overall, Yūkyū no Tierblade is considered a high-quality RPG on the Nintendo Switch that successfully combines engaging storytelling with strategic combat. It is highly recommended for players who enjoy fantasy adventures, emotionally-driven plots, and thoughtful tactical gameplay.