Mega Man X: Dark World

Play every chapter of Deltarune (1 to 5) as Mega Man X, starting from Deltarune's own chapter select.

• X takes Kris's place on the map, in battle and in the menus, with his real SNES sprites from your own Mega Man X Legacy Collection. From Chapter 2 on he runs as X too, and in Chapter 5's platforming he runs, lands and climbs as X.
• You are X in the bullet box. When enemies attack, X drops into the box and plays like Mega Man X: Left/Right run, Z (or Up) jumps, C slides along the floor, hold against a wall to wall slide, then jump to wall kick. X fires the X-Buster, and holding it charges a big shot. Buster shots pop small bullets and give you TP. Special SOULs from later chapters (the yellow shooting SOUL, purple strings, wind) keep their own rules.
• Mega Man X music: ordinary battles in every chapter play the Maverick boss theme, and Chapter 1's King plays Sigma's theme, decoded from your own copy.

You need Deltarune and Mega Man X Legacy Collection (both on Steam). The first time you press Play, the mashup builds its X versions of the chapter select and all five chapters from your two games, which takes about 20 seconds. Nothing from either game is in the download. Your own Deltarune files and saves aren't touched, because the mashup keeps its own saves (start a new game, or copy your saves over if you want to continue).