《那由多之軌跡：改》（日文原名：那由多の軌跡：改，英文名稱：The Legend of Nayuta: Boundless Trails）是由日本Falcom開發的動作角色扮演遊戲，最初於2012年在PSP平台推出，後來於2021年推出高清重製版《那由多之軌跡：改》，並登上PlayStation 4、PC與Nintendo Switch等多個平台。Switch版則於2022年由Clouded Leopard Entertainment在亞洲地區發行。雖然掛著「軌跡」系列之名，但實際上是獨立世界觀作品，與《空之軌跡》或《黎之軌跡》等正統系列並無直接劇情連結。

故事圍繞著生活在邊境小島「雷米亞斯島」的少年「那由多・赫歇爾」（Nayuta Herschel）展開。他對天文與未知世界充滿好奇，時常與好友「希格納·亞哈森」（Signa Alhazen）一同探索遺跡。某日，在觀測隕石雨時，與來自異世界「洛斯提亞（Lost Heaven）」的神秘少女「諾伊」（Noi）相遇。這次邂逅讓那由多踏上前往異世界的冒險旅程，試圖解開世界崩壞的謎團，並在過程中逐步揭開宇宙與時間的真相。

雖然主角是少年，劇情卻涉及不少哲學性與世界觀層次的議題，如「世界的終焉」、「人類與命運的關係」、「時間的循環」等，整體氛圍介於《伊蘇》系列的冒險熱血與《軌跡》系列的豐富敘事之間。劇情節奏明快，支線任務精簡，主線卻完整地描繪出角色的成長與情感羈絆。

在玩法上與傳統《軌跡》系列大不相同，採用即時動作戰鬥系統，整體風格更貼近Falcom的另一知名系列《伊蘇》。分為「城鎮日常」與「關卡探索」兩大部分。在城鎮中與居民互動、接受任務、購買裝備，並在異世界的地圖上挑戰各式關卡。

關卡採線性設計，節奏快且戰鬥流暢。使用劍技與特殊招式應對敵人，並可切換夥伴「諾伊」使用魔法支援或召喚技能。每個關卡還有四季變化的設定，例如春天的版本與冬天的版本地形、敵人和寶藏皆不同，這種設計提供高重玩價值。此外，保留Falcom擅長的成長系統與爽快打擊感，關卡中設有評分機制（如最短通關時間、敵人全滅、無傷過關等），鼓勵挑戰自我並反覆遊玩關卡以取得高評價與稀有獎勵。Switch版本在畫質上進行大幅提升，相較原版PSP畫面更加細膩，並支援60fps的流暢幀率表現。操作上針對Switch Joy-Con做調整，整體體驗輕鬆直覺，無論是新玩家或重玩者都能輕易上手。

在發售後獲得整體正面的評價。媒體普遍稱讚本作是「風格清新、節奏明快」的動作RPG，儘管不是正統的《軌跡》系列續作，卻展現Falcom在小規模敘事與系統設計上的成熟功力。在日本，雖然定位為輕量級作品，但憑藉穩定的戰鬥系統與富有幻想色彩的劇情，吸引了許多喜愛傳統日式RPG的玩家。歐美方面，英文版發售時間較晚，但仍受到喜愛《伊蘇》、《塞爾達傳說》等風格作品玩家的青睞，IGN及RPG Site等媒體給予7至8分不等的好評，認為這是「意外精緻」的動作冒險小品。不過也有部分評論指出，劇情雖然溫馨但略顯簡單，缺乏《軌跡》系列一貫的龐大支線與政治陰謀等複雜元素；關卡設計也可能在中後期顯得重複。儘管如此，整體來說，遊戲提供節奏恰到好處的冒險旅程，尤其適合想要放鬆、享受輕鬆奇幻故事的玩家。

這是結合輕快戰鬥與幻想劇情的動作RPG佳作，雖然名義上屬於「軌跡」系列，實際上更像是Falcom風格的獨立作品。Switch版則以其便攜性與流暢操作，成為重溫這段異世界之旅的最佳平台。對於想在短時間內體驗充滿少年冒險精神與幻想氛圍的玩家而言，無疑是溫柔而精緻的選擇。

The Legend of Nayuta: Boundless Trails (Japanese title: 那由多の軌跡：改) is an action role-playing game developed by Japanese studio Falcom. Originally released for the PSP in 2012, the game received a high-definition remaster titled The Legend of Nayuta: Boundless Trails (改) in 2021, which was later released on PlayStation 4, PC, and Nintendo Switch. The Switch version was published in Asia by Clouded Leopard Entertainment in 2022. Despite bearing the “Trails” (Kiseki) name, this title features a completely separate world and storyline, with no direct narrative ties to mainline entries like Trails in the Sky or Trails into Reverie.

The story follows a curious and adventurous young boy named Nayuta Herschel, who lives on the remote frontier island of Remnant Isle. Fascinated by astronomy and the mysteries of the universe, he spends his days exploring ruins with his best friend Signa Alhazen. One day, during a meteor shower, Nayuta encounters a mysterious girl named Noi from another world called Lost Heaven. This fateful meeting sets Nayuta on an epic journey into a parallel world, where he seeks to uncover the truth behind a looming catastrophe and the very nature of time and space.

Though the protagonist is a young boy, the narrative delves into surprisingly mature and philosophical themes such as the end of the world, humanity’s relationship with destiny, and the cyclical nature of time. The game’s tone strikes a balance between the action-driven energy of the Ys series and the layered storytelling of the Trails franchise. The pacing is brisk, with a streamlined approach to side quests and a focused main story that highlights character development and emotional bonds.

Gameplay-wise, Boundless Trails diverges significantly from traditional Trails titles, opting for a real-time action combat system more akin to Ys. The game is structured into two main parts: life in the town, and stage-based exploration in otherworldly zones. In town, players can interact with NPCs, accept quests, and upgrade equipment. In contrast, the exploration stages offer linear but tightly designed maps filled with enemies, platforming elements, and hidden treasures.

Combat is fast-paced and fluid, centered on sword techniques and special abilities. Players can switch to Noi during battle to cast spells or use summon-style abilities. Each stage features seasonal variations—spring, summer, autumn, and winter—where layouts, enemy types, and loot can all differ, giving players reasons to revisit levels for new experiences and rewards.

Falcom’s signature growth systems and satisfying combat feedback are present. A stage grading system evaluates player performance based on metrics like clear time, enemy extermination, and damage taken, incentivizing replayability and perfectionist runs.

The Switch version notably enhances visuals over the original PSP release, offering sharper details and smoother performance at 60fps. Controls have been optimized for the Joy-Con, making for a highly accessible and intuitive gameplay experience suitable for both newcomers and returning fans.

Upon release, Boundless Trails received generally favorable reviews. Critics praised it as a “refreshing and fast-paced” action RPG. While it isn’t a direct continuation of the main Trails saga, it showcases Falcom’s talent for tight, small-scale storytelling and refined game design.

In Japan, it was considered a lightweight title, yet it still attracted traditional JRPG fans thanks to its solid combat mechanics and whimsical fantasy narrative. In the West, although the English version arrived later, it was well-received by fans of games like Ys and The Legend of Zelda. Outlets such as IGN and RPG Site rated it between 7 and 8 out of 10, calling it a “surprisingly polished” adventure title.

Some reviewers noted that while the story is heartfelt, it may feel a bit simplistic, lacking the complex subplots and political intrigue found in other Trails games. The stage design, while charming, can become repetitive in the latter half of the game. Nevertheless, the game offers a well-paced and enjoyable adventure—particularly suited for players looking for a lighthearted and fantastical narrative experience.

Ultimately, The Legend of Nayuta: Boundless Trails is a delightful action RPG that blends fast combat with an imaginative storyline. Though it carries the “Trails” name, it stands on its own as a Falcom-styled spin-off. The Switch version, with its portability and smooth controls, serves as the ideal platform to experience (or revisit) this whimsical journey through time and space. For players in search of a short but heartfelt adventure filled with youthful wonder and fantasy, this title is undeniably a gentle and polished gem.