Stigma (letter) Stigma (letter) Stigma (ϛ) is a ligature of the Greek letters sigma (Σ) and tau (Τ), which was used in writing Greek between the Middle Ages and the 19th century. It is also used as a numeral symbol for the number 6. In this unrelated function, it is a continuation of the old letter digamma (originally Ϝ, cursive form ), which had served as a numeral since antiquity and was conflated with the σ-τ ligature in the minuscule handwriting of the Middle Ages. The στ ligature (, ) was one of many ligature forms that came into widespread use as
Torque (game engine) (non-skinned meshes worked), and the 3D rigid-body physics suffered from several issues. The Torque engine and its derivatives have been used in the development of a variety of games, especially among independent video game developers. Commercial titles developed using the Torque engine include "BoneTown", "Blockland", "Marble Blast Gold", "Minions of Mirth", "TubeTwist", "Ultimate Duck Hunting", "", "ThinkTanks", "The Destiny of Zorro", "Penny Arcade Adventures" and indie video games "The Age of Decadence", "BeamNG.drive", "The Cat and the Coup", "Dead State", "Frozen Synapse", and "S.P.A.Z.". Torque (game engine) Torque Game Engine, or TGE, is an open-source cross-platform 3D computer game engine,