《零式戰機2- for Nintendo Switch》（ZERO GUNNER 2- for Nintendo Switch/ゼロガンナー2- for Nintendo Switch）是由經典街機遊戲開發商Psikyo原創，並由CITY CONNECTION旗下的Zerodiv重新移植的垂直射擊遊戲。原作於2001年在SEGA Dreamcast平台上發售，因其360度自由旋轉射擊機制、軍武風格機體設計與爽快打擊感而在射擊遊戲迷之間獲得cult級人氣。Switch移植版則是將當年的街機風格完整保留，搭配高清畫質與現代化介面，使新一代玩家也能體驗這款經典彈幕射擊遊戲的魅力。

世界觀設定在一個近未來的架空地球，三名玩家所操作的主角是「零式戰機」（Zero Gunner）小隊的直升機型戰鬥機，分別是Copter AH-64（類似阿帕契攻擊直升機）、Copter SH-2與Copter UH-9，每台機體都有獨特的武器配置與特殊攻擊。敵人則是以暴走的人工智慧軍團為首，包括各式飛行器、重型機甲、戰車與變形BOSS等。任務是深入城市、海上基地、工業區與雪山等各地戰場，摧毀敵方勢力，阻止世界陷入全面軍事失控的混亂。

在操作方面，最具特色的是它與傳統垂直卷軸射擊不同，採用「360度旋轉射擊系統」。不只可以上下左右移動機體，還能按下旋轉按鍵，使機體以螺旋狀旋轉並改變射擊方向，這種設計讓戰鬥更具有戰術性與動態感。配合場景中四面八方來襲的敵人與彈幕攻擊，如何靈活運用旋轉與射擊角度就成為遊戲的核心挑戰。此外，每架戰機還配有可蓄力的特殊攻擊（如追蹤飛彈、大型雷射、擴散炸彈等），能夠在關鍵時刻突破彈幕與削弱BOSS防線。

Switch版本對原作的畫面進行HD化處理，保持街機風格的同時提升清晰度與色彩飽和度，搭配現代電視與掌機模式仍能呈現乾淨流暢的視覺體驗。音效部分保留當年的電子搖滾風格BGM，充滿緊張節奏與未來感。操作上支援Joy-Con與Pro控制器，亦可透過雙人合作模式共同挑戰關卡，強調街機精神與本地同樂感。

市場評價方面，獲得射擊遊戲愛好者與懷舊玩家的普遍好評。玩家稱讚其保留原作的高速節奏與技巧深度，旋轉射擊機制依然新穎且具有挑戰性，是少數能在現代平台上重溫Psikyo獨特風格的機會。節奏緊湊但不失公平，關卡設計具變化，BOSS戰過程爽快而不失策略性，是典型的「容易上手，難以精通」作品。

然而部分評價也指出，Switch移植版在畫面比例與部分畫質銳利度上有所調整，與原版有所不同，加上並未收錄過多額外內容或美術資料，對於非系列粉絲來說可能略顯薄弱。此外，遊戲本身篇幅不長、難度偏高，也使得新手玩家需要花時間適應。

總結來說，《零式戰機2- for Nintendo Switch》是忠於原味的街機射擊重製作，保留90年代末至2000年代初的彈幕射擊風格與機體魅力，透過Switch平台得以再度活躍於現代玩家眼前。對於喜愛Psikyo風格、機甲題材與高技巧射擊遊戲的玩家而言，無疑是值得收藏與挑戰的經典佳作。

"ZERO GUNNER 2- for Nintendo Switch" is a vertical scrolling shoot-’em-up developed originally by the classic arcade game company Psikyo, and re-released by Zerodiv, a label under CITY CONNECTION. The original version was released in 2001 for the SEGA Dreamcast and quickly gained cult popularity among shmup enthusiasts due to its 360-degree rotation shooting mechanic, military-themed mecha designs, and exhilarating combat feedback. The Nintendo Switch version faithfully preserves the arcade spirit of the original while enhancing it with HD visuals and a modern interface, making this legendary bullet hell experience accessible to a new generation of players.

Set in an alternate near-future Earth, the game follows three playable helicopter-type combat machines from the "Zero Gunner" squad: Copter AH-64 (resembling the Apache attack helicopter), Copter SH-2, and Copter UH-9. Each unit is equipped with unique weapon systems and powerful special attacks. The enemy forces consist of a rogue AI-controlled military faction, featuring a wide array of adversaries including flying drones, massive mechs, tanks, and transforming bosses. Players must engage in fast-paced missions across various environments such as urban centers, sea bases, industrial zones, and snowy mountains, with the goal of neutralizing the threat and preventing global military collapse.

The game’s most distinctive feature is its 360-degree rotation shooting system, setting it apart from traditional vertical shooters. Not only can players move their unit in all directions, but they can also rotate it using a specific command button, allowing for free-aiming and tactical engagement with enemies from all angles. This mechanic adds a layer of dynamic strategy to the gameplay, especially when dealing with enemies and projectiles coming from every direction. In addition to standard firepower, each helicopter is equipped with a chargeable special weapon, such as homing missiles, large lasers, or wide-range bombs, which can be unleashed at critical moments to break through bullet barrages or exploit boss vulnerabilities.

For the Switch release, the game’s graphics have been remastered in HD, maintaining the retro arcade art style while improving visual clarity and color saturation for modern screens in both docked and handheld modes. The original electronic rock soundtrack is preserved, retaining its high-tempo, futuristic feel that amplifies the tension and action. The game supports Joy-Con and Pro Controller configurations and offers two-player local co-op, bringing back the arcade spirit of shared play and camaraderie.

In terms of reception, shoot-'em-up fans and retro game collectors have responded positively to this re-release. The game is praised for retaining the original’s speed, challenge, and mechanical depth. The rotation shooting mechanic remains as fresh and demanding as ever, making "Zero Gunner 2" a rare and valuable title on modern platforms for experiencing Psikyo’s unique design philosophy. The fast but fair gameplay, varied level design, and exhilarating boss encounters contribute to a high replay value, with a classic “easy to play, hard to master” balance.

However, some critiques have been made regarding the visual adjustments in the Switch version, particularly the aspect ratio and image sharpness, which differ from the Dreamcast original. Furthermore, the lack of bonus content or behind-the-scenes materials may feel sparse to those unfamiliar with the series. The game’s relatively short length and high difficulty curve can also be intimidating to newcomers, requiring time and patience to fully adapt and master its mechanics.

In summary, "ZERO GUNNER 2- for Nintendo Switch" is a faithful and exhilarating port of a beloved arcade shooter. It captures the essence of late-90s and early-2000s bullet hell titles with military mecha flair, dynamic 360-degree shooting, and tight gameplay mechanics. For fans of Psikyo games, high-skill shooters, or mechanical design aesthetics, this title is a standout gem well worth revisiting or discovering anew on the Switch.