This is a DSi mode version by Sektor of Dopefish's modified version of Sektor's dualHexen, a port of Hexen to the Nintendo DS. Note that Sektor's version is itself a modification of Rich Whitehouse's hexenDS.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi