Can you edit that into the OP?
50k seems meh for City Shrouded in Shadow. Although, it doesn't seem to be very big budget.
Very small budget, equally small company.
This is basically the 絶対絶命都市 (Zettai Zetsumei Toshi / Disaster Report / Raw Danger!) series (but with monsters). These Granzella guys are probably from Irem software.
Granzella is working on releasing ZZT4 on PS4 at the moment.