If you are playing (or a similar eldritch horror game), here is how you generally perform a Halloween or Summoning Ritual. The Ritual Guide 1. Locate the Altar You must find a specific interaction point. In most Lovecraftian games, this is a Stone Altar , a Pedestal , or a strange glowing symbol on the ground usually found in a dungeon, a basement, or a spooky outdoor clearing. Visual Modflow Flex 70 Crack Verified ✓