This paper outlines the stimulation program used for successful completion of the 15,687-ft total-vertical-depth (TVD) horizontal well, Well Soehlingen Z10, in the tight Rotliegendes sandstone, onshore Germany. The program included the breakdown multiple-rate injectivity test, use of proppant erosion stages to reduce near-wellbore restrictions, and minifracture data analysis. Use of open annulus to analyze the stimulation treatment and to modify the design is also covered. Considerations and experiments behind the design and execution of this horizontal well stimulation with hydraulic fractures perpendicular to the wellbore are presented and discussed.