This lecture reviews hydraulic fracturing and alternative fracturing technologies, by searching the open literature, patent databases and commercial websites. For each identified technique, an overview is given. The technique is then briefly explained, and its rationale (reasons for use) is identified. Potential advantages and disadvantages are identified, and some considerations on costs are given. Finally, the status of the technique (for instance, commercially applied, being developed, concept, etc.) is given for its application to shale gas production. Why Unconventional Gas Reservoirs need to be Hydraulically Fractured; The importance of complex hydraulic fracture geometry; The Hydraulic Fracturing Process described; Fracturing Materials; What Can We Control During a Fracture Treatment?; Why cause and effect with respect to production are not always obvious; Key Considerations for Hydraulic Fracturing of Gas Shales; Why We Fracture Shale Gas Wells…!; The Hydraulic Fracturing Processes; Functions of the Fracturing Fluid; Fracturing Challenges in Unconventional Gas Reservoirs; Post Fracture Treatment Monitoring Methods; Fracture Treatment Validation Via Microseismic Monitoring