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The study of the interactions of living adherent cells with mechanically stable (visco)elastic materials enables understanding and exploiting physiological phenomena mediated by cellextracellular communication. Insight on the interaction of cells and surrounding objects with different stability patterns upon cell contact might unveil biological responses to engineer innovative applications. Here, we hypothesize that the efficiency of cell attachment, spreading and movement across a free-packed granular bed of microparticles depend on microparticle diameter, raising the possibility of a necessary minimum traction force for the reinforcement of cell-particle bonds, and long-term cell adhesion. The results suggest that microparticles with 14-20 µm are prone to cell-mediated mobility, holding the potential of inducing early cell detachment, while objects with diameters from 38-85 µm enable long-lasting cell adhesion and proliferation. An insilico hybrid particle-based model that addresses time-dependent biological mechanisms of cell adhesion is proposed, providing inspiration for engineering platforms to address healthcare-related challenges.