Memorisation is the carrying over of remembered information from earlier attempts, sessions, or observations into later play. It can be a skill source when players learn routes, enemy timings, map layouts, or puzzle solutions, but it can also become a cognitive burden if the game depends too heavily on rote recall rather than readable information in the current moment. In spatial games, returning fog-of-war and sparse save-points often increase the value and cost of memorisation (Björk & Holopainen, Patterns in Game Design, see source-patterns-in-game-design).
Related: fog-of-war, save-points, player-guidance, exploration