For tunnels in hard rock, fibre-reinforced shotcrete (sprayed concrete) is an essential part of the rock support system. Due to the complexity of estimating the load on the shotcrete, design philosophies and guidelines vary between countries. This also applies to fibre type, where some countries only allow fibres of a certain material. With this background, the suitability of using steel, synthetic and basalt fibres in shotcrete linings was studied in a recently finalized project. The aim was to evaluate the structural performance through experimental testing, investigate the environmental impact of the fibres and summarize the knowledge regarding the long-term performance of the fibres. The project has shown that all three fibres are suitable to use in tunnels from a structural perspective, but some questions regarding long-term performance still exist. From an environmental perspective, the choice of fibre type has, compared to shotcrete, a negligible effect on greenhouse gas emissions.