: On a Recalbox PC, the PPSSPP core is the preferred method for running the PSP version of XX . It offers redrawn graphics, native widescreen support (unlike the DS original), and allows for the critical "autofire" toggle not present in many older ports.
By 2021, Recalbox (version 7.x and early 8.0 Beta) offered excellent performance for NDS on PC. metal slug 7 rom mame recalbox pc 2021
: For the purest experience, you can run the original Metal Slug 7 ROM using the DeSmuME or melonDS cores included in Recalbox. Note that while it uses the DS's dual screens for a map and inventory, it remains a traditional run-and-gun experience at its core. Configuration Tips for Recalbox : On a Recalbox PC, the PPSSPP core
Here are some specific steps: