《路易吉洋樓2》（ルイージマンション2 / Luigi's Mansion: Dark Moon）是由Next Level Games開發，任天堂於2013年在3DS平台推出的動作冒險遊戲，也是《路易吉洋樓》系列的第二部作品。相較於初代在GameCube上的表現，在玩法與內容上進行大幅擴展，讓玩家能更深入體驗路易吉獨自面對鬼屋挑戰的緊張與趣味，也進一步確立本系列作為路易吉代表性作品的地位。

故事背景設定在幽靈頻繁出沒的地區—幽靈谷（Evershade Valley）。原本這裡的幽靈們都因「黑月（Dark Moon）」的力量而變得溫順，直到某天神秘力量將黑月擊碎，碎片散落到五棟鬼屋中，導致所有幽靈變得兇暴難馴。為恢復和平，幽靈研究專家愛力教授（Professor E. Gadd）不得不再次召喚膽小的路易吉出馬，帶著升級版的鬼魂吸塵器「Suction Poltergust 5000」，踏入危機四伏的鬼屋中尋回黑月碎片，並解開一連串靈異事件背後的真相。

與初代只集中在一棟大宅邸不同，將遊戲世界擴展為五棟風格迥異的鬼屋，包括森林中的植物研究所、冰雪覆蓋的山中工廠、古老的時鐘塔與沙漠遺跡等，每棟洋樓都有獨立的主題、機關設計與專屬的幽靈敵人。這種分段式的設計讓遊戲節奏更緊湊，也方便玩家分階段挑戰，並提升重玩價值。

操作方面，需要細膩地操控路易吉進行探索、解謎與抓鬼。核心玩法圍繞著手電筒與鬼魂吸塵器的搭配使用。當使用手電筒閃光（Strobulb）照射幽靈，就能讓牠們進入虛弱狀態，這時啟動吸塵器就能開始拉扯，進行一場力量與耐心的對決，直到將其完整吸入。在吸取過程中需要透過操作類比搖桿控制方向與力度，有一種彷彿釣魚般的手感。除抓鬼外，還需運用吸塵器吸取布簾、旋轉機關、搜尋隱藏道具，或是使用「黑光手電筒」（Dark-Light Device）來揭示隱形物體與被幽靈偷走的物件。

遊戲同時也強調解謎元素。每棟鬼屋中都布滿精心設計的謎題與互動物件，常常需要觀察環境細節、操作特定順序、或結合多個裝置才能打開通路或取得關鍵道具。這些謎題設計不僅考驗觀察力，也與整體場景主題緊密結合，使探索過程充滿趣味。

在每個關卡結束時，會根據玩家表現給予評分，包含完成時間、抓到的幽靈數量、所收集的金幣與秘密寶藏等。若能在關卡中收集齊全隱藏的寶石與金骨頭，還能解鎖額外關卡與內容。此外，支援本地與線上多人合作模式，稱為「驚魂大廈」（ScareScraper），最多可與三位其他玩家合作，在高樓層的鬼屋中進行限時抓鬼、尋寶或生存挑戰，為遊戲增添豐富的重玩性與社交互動。

在美術風格上，運用3DS的裸眼立體顯示功能，營造出深度十足、層次分明的場景空間。每個洋樓都有獨特的視覺主題與幽靈設計，從滑稽、詭異到驚悚氛圍兼備，同時也貫徹任天堂一貫的卡通幽默風格。音樂與音效亦極具巧思，尤其是路易吉的喘息聲、哼唱BGM與環境音交織在一起，讓玩家更加沉浸在「害怕又不得不前進」的情境之中。

市場評價方面，獲得普遍好評。媒體與玩家大多讚賞其精緻的關卡設計、創意的解謎機制與充滿魅力的主角演出。尤其是對路易吉的塑造備受好評，他既膽小又可愛，時常自言自語、發抖甚至哼哼唱唱，成功打造出一個與瑪利歐截然不同的主角形象。評論也指出本作的遊戲節奏設計合理，關卡篇幅適中，很適合掌機的遊玩形式。多人模式雖然較為簡單，但合作性與趣味性足夠，為主線之外提供良好變化。

然而，也有部分玩家認為遊戲中的回頭路設計稍嫌繁瑣，偶爾會因為觸發機關或蒐集要素而被迫反覆穿梭同一地區。加上存檔僅限於關卡之間，對於希望隨時中斷遊戲的掌機玩家而言，可能稍有不便。

總體而言，這是兼具趣味性、挑戰性與創意的優秀作品，不僅深化系列的玩法，也讓路易吉從過去的配角成功蛻變為獨當一面的主角。無論是喜歡動作解謎、恐怖幽默或任天堂角色的玩家，都能在本作中找到樂趣，是3DS平台上不可錯過的佳作之一。

Luigi’s Mansion: Dark Moon (Japanese title: ルイージマンション2 / Luigi’s Mansion 2) is an action-adventure game developed by Next Level Games and published by Nintendo for the Nintendo 3DS in 2013. It is the second installment in the Luigi’s Mansion series. Compared to the original GameCube title, this sequel greatly expands upon the gameplay and content, allowing players to further experience the tension and fun of Luigi facing haunted mansions alone. It also firmly establishes this series as a defining title for Luigi as a lead character.

The story is set in Evershade Valley, a region known for frequent ghost activity. Normally, the ghosts there were pacified by the power of the Dark Moon. However, one day a mysterious force shatters the Dark Moon, scattering its fragments across five different haunted mansions, causing the ghosts to turn aggressive and uncontrollable. To restore peace, ghost expert Professor E. Gadd once again calls upon the timid Luigi, equipping him with an upgraded ghost-hunting vacuum, the Poltergust 5000. Luigi must brave the ghost-infested mansions, retrieve the Dark Moon fragments, and uncover the truth behind the string of paranormal incidents.

Unlike the original, which was set entirely in one large mansion, this game expands its world across five uniquely themed mansions, including a plant research lab in a forest, a snow-covered mountain factory, an ancient clock tower, and desert ruins. Each mansion features its own unique themes, puzzle designs, and ghost enemies. This segmented design creates a tighter gameplay rhythm, making it easy for players to tackle the adventure in stages while increasing replay value.

Gameplay requires players to carefully control Luigi as he explores, solves puzzles, and captures ghosts. The core mechanic revolves around combining a flashlight and the Poltergust. By using the Strobulb flashlight to stun ghosts, players can then activate the vacuum to begin pulling them in, engaging in a tug-of-war-like battle of strength and patience until the ghost is fully captured. During this process, players must use the control stick to adjust the pulling direction and tension, giving it a tactile, almost fishing-like feel. Beyond ghost-catching, the vacuum is also used to pull curtains, turn cranks, find hidden items, and with the Dark-Light Device, reveal invisible objects and recover stolen items.

The game also places a strong emphasis on puzzle-solving. Each mansion is filled with cleverly designed puzzles and interactive objects. Often, players must observe environmental details, activate devices in specific sequences, or combine multiple objects to open paths or acquire key items. These puzzles are well-integrated with each mansion’s theme, making exploration engaging and rewarding.

At the end of each mission, players receive a performance rating based on completion time, the number of ghosts caught, coins collected, and hidden treasures found. Collecting all hidden gems and golden bones in each stage unlocks additional content and extra missions. The game also supports both local and online multiplayer in a cooperative mode called ScareScraper. Up to four players can team up to hunt ghosts, search for treasures, or survive time-based challenges in multi-floor haunted towers, adding variety and social interaction to the game.

Visually, the game makes great use of the 3DS’s glasses-free 3D display, creating rich, layered environments with a strong sense of depth. Each mansion has its own distinct visual theme and ghost designs, ranging from humorous to eerie, while still maintaining Nintendo’s signature cartoonish humor. The music and sound effects are also thoughtfully crafted, with Luigi’s nervous humming, breathing, and murmuring blending with the atmospheric sounds, immersing players in the feeling of being both scared and determined to move forward.

The game was well-received by both critics and players. It was widely praised for its well-crafted level designs, creative puzzle mechanics, and Luigi’s charming performance. Luigi’s portrayal, in particular, was highly acclaimed — his timid yet lovable personality, constant muttering, trembling, and humming made him a distinct and endearing protagonist, very different from Mario. Critics also noted that the game’s pacing was well-balanced, with appropriately sized stages well-suited for portable play. While the multiplayer mode was relatively simple, it offered enough cooperative fun and variety to be a worthwhile addition to the main story.

That said, some players felt that backtracking within levels could occasionally become tedious, as certain triggers or collectible requirements forced revisits to the same areas. Additionally, since the game only saves between missions, it could be slightly inconvenient for handheld players looking to pause at any moment.

Overall, Luigi’s Mansion: Dark Moon is a high-quality, fun, and creative title. It not only expanded on the series’ gameplay foundations but also successfully transformed Luigi from a side character into a capable, standalone hero. Whether you're a fan of action-puzzle games, spooky humor, or Nintendo’s character-driven adventures, this is a must-play gem on the 3DS.