Flashback uses a side-view perspective with screen-by-screen areas connected into larger stages. Conrad must reach objectives, find access cards and other items, operate terminals, avoid traps, and defeat or evade enemies. Movement includes running, jumping, climbing ledges, drawing a pistol, and interacting with objects.

The campaign is divided into missions set on different worlds and locations. Progress depends on observing environmental clues and using the correct item at the right place rather than simply defeating every opponent. Lives and limited resources make mistakes costly, while later missions introduce more complex hazards, puzzles, and enemy encounters.

Observe each screen before moving. Many deaths come from rushing into traps or enemy fire rather than from difficult combat.

• Search platforms and rooms for access cards, shields, teleporters, and other mission-critical items.
• Use the pistol from a safe distance, but conserve shields and avoid unnecessary fights.
• Save progress when the game provides an opportunity, then test unfamiliar ledges and terminals carefully.