Criminal Case : You join the Grimsborough police to investigate murders by scavenging crime scenes, collecting hidden objects, interrogating suspects, and analyzing evidence. This long‑running mobile classic blends casual hidden‑object mechanics with narrative case files. While it features an energy system and optional IAPs, gameplay remains accessible for free players. Cases span multiple arcs and themes, and each chapter challenges observational skills, logic, and deduction in a fun, procedural‑style detective format.