Metal Slug 4

Metal Slug 4 is a classic horizontal scroll arcade shooting game released in 2002 for the Neo‑Geo platform, developed by Mega Enterprise and Noise Factory after SNK’s restructuring. As the fourth official installment of the iconic Metal Slug series, it inherits the exquisite pixel art, gorgeous explosion effects and fast-paced combat of previous works, while introducing brand-new playable characters, exclusive gameplay mechanisms and upgraded weapons and vehicles. It remains a beloved vintage arcade shooting classic for retro game enthusiasts worldwide. Set one year after the ending of Metal Slug 3, the game continues the classic military sci-fi worldview and confronts rebel forces and mysterious enemy factions. It features an updated character roster, introducing two brand-new protagonists, Trevor and Nadia, alongside returning classic characters Marco and Fio. Optimized action modules and smooth combat animations bring a fresh and fluent gaming experience different from previous series entries. Metal Slug 4 adds innovative gameplay features on the basis of retaining core series mechanics. The newly launched medal scoring system allows players to collect medals and build kill combos for extra scores, greatly improving replayability and score-chasing fun. It also introduces a unique mutation system: players hit by enemy scientists will transform into monkey form with exclusive movement and attack attributes, bringing rich randomness and interesting easter eggs to the traditional level-clearing gameplay. The game expands the weapon and vehicle system comprehensively, adding the powerful dual machine gun (2H) and upgrading firepower performance. It retains classic weapons such as shotguns, rocket launchers and laser weapons, and enriches tactical matching diversity. It inherits classic sea, land and air vehicles while adding new exclusive vehicles including forklifts, walking mechs and special military trucks. With six progressive levels spanning urban ruins, jungles and military bases, and spectacular elite boss battles, the game delivers immersive and thrilling combat experience. Supporting classic two-player co-op mode, Metal Slug 4 is perfect for team-based arcade entertainment. It provides adjustable difficulty modes for both casual beginners and skilled veteran players. Fully compatible with various arcade emulators, it runs smoothly on modern devices and perfectly restores the original pixel visuals, sound effects and tight combat rhythm, standing as an enduring classic in retro arcade shooting games.

以下はデフォルトのキー配置です。 アーケードは基板ごとにボタン数も意味も違います。上の表は基板の 1〜6 番目のボタンがどのキーに来るかです。ネオジオ（ザ・キング・オブ・ファイターズなど）の A/B/C/D はボタン 1〜4、メタルスラッグは 1・2・4 だけ（ショット / ジャンプ / 手榴弾）、パックマンはボタンを使いません。 3 パンチ 3 キックの 6 ボタン格闘（ストII など）はコアが別の配置に切り替えます：弱パンチ U、中パンチ I、強パンチ Q、弱キック J、中キック K、強キック E。 プレイヤー下部のゲームパッドアイコン 🎮 →「キー設定」で、エミュレーター本体のボタン設定を開けます（キーボードとゲームパッドの両方、自動保存）。 ゲームパッドは自動で認識されます。 スマートフォンでは画面上にボタンが表示されます。