| Title | Year | Emulation Score (1-10) | Notable Issues | Best Feature in OpenEmu | |-------|------|----------------------|----------------|-------------------------| | Metal Slug (1) | 1996 | 10/10 | None | Perfect sprite scaling, no screen tearing | | Metal Slug 2 | 1998 | 9/10 | Known original slowdown – emulator replicates it accurately | Shaders can mitigate slowdown perception | | Metal Slug X | 1999 | 10/10 | None | Run-ahead reduces input lag to arcade-perfect levels | | Metal Slug 3 | 2000 | 10/10 | High memory usage | Save states work perfectly for the very long final mission | | Metal Slug 4 | 2002 | 10/10 | None | Cheat codes (infinite ammo) easily applied | | Metal Slug 5 | 2003 | 9/10 | Minor graphical glitch in stage 4 (rare) | Controller rumble support via DualSense/DS4 |

| Game | Required .zip filename (common) | |------|--------------------------------| | Metal Slug | mslug.zip | | Metal Slug 2 | mslug2.zip | | Metal Slug X | mslugx.zip | | Metal Slug 3 | mslug3.zip | | Metal Slug 4 | mslug4.zip | | Metal Slug 5 | mslug5.zip |

Marco leaned forward. No bombs left. The train’s turrets rained lead. He jumped— squeak of his boots—dodged a grenade, landed on the ammo crate. Pistol, pistol, pistol. Each shot was a punctuation mark of focus.

Preserving Classic Gaming Experiences: A Case Study on OpenEmu and Metal Slug

OpenEmu expects specific ROM names from a matching MAME set.