There is no official “gravestone cheat” in The Sims 2. However, you can simulate the effect using built-in cheats or custom content.
aging off + death Cheat (Visual Only)aging off → Enter. Sims stop aging.death → Enter. The selected Sim collapses into a coffin (not truly dead).resetSim [FirstName] [LastName]..package files in Documents/EA Games/The Sims 2/Downloads/.kill Cheat (Actually Kills the Sim)kill [LastName] (e.g., kill Goth).Note: Heavy cheat use can corrupt neighborhoods. Back up your Neighborhoods folder before experimenting.