Nemesis: Lockdown transports the series' tension to a new setting – a secret underground base on Mars, featuring multiple levels linked by stairs and elevators. The modular board creates a cramped station of corridors, labs, and power rooms, ensuring every game feels fresh. As in the original, the experience is semi‑cooperative: most players strive to survive alien threats, repair critical systems, and complete exploration objectives, while each holds a hidden agenda that may clash with the group. New mechanics such as the CSS hatch system, power and light management across levels, and contingency procedures heighten the strategic depth. Characters bring variable powers and special abilities, and the expansion adds a new alien race that further spices up combat. Icon‑dice, battle‑card driven campaign flow, and options for solo or traitor play guarantee high replay value. With a 3.9 complexity rating, the rules are moderate, but the cinematic feel, detailed miniatures, and premium components make the 90‑180 minute playtime worthwhile. In short, Lockdown expands Nemesis' universe with more space, more danger, and even more reasons to mistrust your crewmates.