I've owned "Scurge: Hive" for a while, buying it used as a loose cartridge about 15 years ago after the DS had become huge, and never really played it until recently...
I must say, it's definitely an underrated title, at least graphically! My only complaint so far about the play is the same many other isometric games share in term of alignment and d-pad control, but the structure is nice, the bosses have interesting mechanics, and the "Metroid: Fusion"-like infection mechanic adds to the sense of agency, pushing the player forward in almost a "DOOM 2016" way...
I would hope it can get up to "recommended", as it's little known and if I have definitely under-appreciated it, so have others.