This paper explores the role of opposition parties within the context of global democratic erosion, with a focus on Turkey. It investigates the multifaceted role of opposition actors in the process of autocratisation, challenging conventional portrayals of them as mere victims or resilient forces. Drawing on a comprehensive analysis of the main opposition party, the Republican People’s Party (CHP), spanning the critical period of 2002–2022 under the rule of the Justice and Development Party (AKP), this research uncovers how opposition strategies have evolved in response to changing political dynamics. The paper introduces two new concepts, rigid opposition and flexible opposition, to elucidate the adaptive nature of opposition strategies in the face of autocratisation. It underscores the transition of the CHP from a rigid stance, characterised by identity-based polarisation, to a more flexible approach, involving strategic alliances and inclusive discourse. This transformation is not a binary success–failure paradigm but rather a complex adaptation with inherent risks. While flexibility is crucial to limit autocratisation, its potential pitfalls carry the risks of contributing to autocratisation and the dilution of party identity.