Deploy festive and unique character variants, including Santa Claus cosplayers and adorable swimsuit soldiers. Performance & Balancing Changes

Let’s address the elephant in the room. The keyword includes – Nintendo Submission Package – which refers to the installable file format used by hacked Switches (Atmosphere, SX OS, etc.).

For the latest technical patches or to verify specific NSP file versions, you can check the SNK Corporation Official Press Page or community forums like Reddit's Metal Slug Attack community for user-verified version numbers.

: Supports Room Battle for friends and Matching Battle for global competition to earn the "Super Devil" title.

The base 1.0.0 version suffered from noticeable frame drops, especially when the screen filled with enemy slugs and special attacks. Update 1.1.0 introduces aggressive optimization, particularly for docked mode. While the game targets 60 FPS, this patch significantly reduces stuttering during the "Rush" auto-battler sequences.

Upgraded character portraits and UI scaling optimized for both handheld and docked output modes. METAL SLUG ATTACK RELOADED for Nintendo Switch

Ensure your Switch system firmware is compatible with the latest game update version.

As of April 2026, the most significant expansion remains the major free content update released in late November 2024, which significantly enhanced the game's roster and longevity. 株式会社SNK Expanded Roster : 20 new units were added, including the brand-new "Reika for Liberty" and returning seasonal favorites like "Christmas Midori" "Everlasting Summer Abigail" New Campaigns : Seasonal events like the Everlasting Summer campaigns were reintroduced with extreme difficulty modes for veteran players. Story & Stages

The term is essential jargon for any Nintendo Switch user. NSP stands for "Nintendo Submission Package." It is the file format used for digitally distributed games (eShop titles). In the context of emulation or console homebrew, an NSP file is a digital copy of the game that can be installed.

Unlock classic artwork, concept designs, and high-quality music tracks.