Instructions
Download and install ̶0;SRB2̶1; Doom Builder, the level editor for ̶0;SRB2̶1; at the time of publication.
Open ̶0;SRB2̶1; Doom Builder. Create a new map by clicking ̶0;File,̶1; then ̶0;New Map.̶1;
Create the dimensions of the map to correspond with the ̶0;Sonic 2̶1; map that you want to replicate. Establish the linedefs in a geometric pattern to create the borders of the map. Avoid placing linedefs so that they cross over each other, and be sure to create a completely closed shape with all of the linedefs.
Create thok barriers along the outside rim of the level to prevent players from being able to run outside of the game world.
Alter all variables in the level header, such as the Palette for terrain colors, the SkyNum to determine the cloud cover, or event-related variables such as making the level a time attack.
Design terrain features throughout the level that correspond to a ̶0;Sonic 2̶1; level. ̶0;SRB2̶1; is a 3D environment, while "Sonic 2" is entirely 2D, so make use of all terrain space throughout the level.
Save the map to the desktop.
Run ̶0;Sonic Robo Blast 2̶1; and open the map file you created to run your ̶0;Sonic 2̶1; level mod in ̶0;Sonic Robo Blast 2.̶1;