The first floor of A.I.G.I.S., 'Cyber City', immediately introduces the light-dark mechanics. You'll encounter 'Security Bot' F.O.E.s that are active in light but become dormant in darkness, or vice-versa. There will be 'Light Switches' that toggle the illumination of specific areas. Your goal is to use these switches to create safe passages, either by deactivating F.O.E.s or by revealing hidden paths that only appear in light.
Some areas will have 'Laser Grids' that block your path. These often require you to find a control panel or activate a series of switches to disable them. Pay close attention to the F.O.E.s' detection cones, which are clearly visible on your map. These cones change based on the light conditions. You'll also find 'Data Fragments' scattered around, which are collectibles that provide lore and sometimes unlock new features in the Central Cinema. Map drawing is crucial for tracking light switch effects and F.O.E. positions. Proceed to the next floor once you've navigated the light puzzles and found the stairs.