In order to accommodate the Sim’s head, the robe has been enlarged from the one used on Death, but regardless still looks good. Mod the Sims user has converted Death’s robes into a wearable outfit for sims to wear.
There are a number of mods available for download which add the Grim Reaper’s costume to the game as a costume for any Sim to wear as the player sees fit. There are a few methods of obtaining the outfit in Sims 3 as well. The downside to this method of gaining the outfit is that the player must rifle through every outfit in the game to find Death’s outfit. Then you can Create a Family, press Shift+N and find the grim reaper’s robes at the end of the clothing list.
In the Sims 2, you are able to unlock the Grim Reaper Outfit by pressing CTRL+Shift+C and typing the string “boolProp testingcheatsenabled true”. Unlocking the Sims 3 Grim Reaper Outfit Through the Console