Strike Energy (ASX: STX) represents our preferred ‘unconventional’ energy play. Few companies can offer investors such high-quality exposure to the huge, untapped potential of unconventional energy within South Australia’s Cooper Basin. Strike's clear focus is on defining the commercial viability and overall resource extent of its project, with the ultimate aim of delivering gas under long-term supply arrangements to growing and energy-starved markets in Eastern and Southern Australia. Importantly, the company’s exploration and appraisal costs for the foreseeable future are fully-funded and it has keen buyers lined up for future gas production. The positive results from the company’s ongoing flow-testing program have flowed through into a robust share price performance, which has resulted in a 40% increase over the past few weeks. Compare this with the company’s high-profile Cooper Basin peers – Beach Petroleum (ASX: BPT) and Santos (ASX: STO) – which have recorded share price falls of 45% and 52% respectively over the last 12 months.