A Forge term for control over the protagonist characters' thematically-significant decisions by anyone who is not the character's player. It is considered an awkward term by Ron Edwards because of (1) its sense of imposed mandate and strength-in-control, and (2) its parodic Star Wars connotation. Originally called "GM-oomph" (Ron Edwards), then "GM-Force" (Mike Holmes). See also Railroading.

References:

• Illusionism: a new look and a new approach
• IntCon vs GM Oomph?!