Survival Needs Clock

One or more meters fall continuously. Crossing a threshold applies penalties, usually stat loss first and damage later, and restoring the meter costs a consumable that has to be found, bought, farmed or cooked. Effect on play is temporal rather than spatial: the clock forbids indefinite caution, turns exploration into a supply problem, and makes every detour a calculation about whether the return trip is affordable.

Rogue included a food clock around 1980 for a specific reason. Without one, a patient player can grind a randomly generated dungeon indefinitely, resting after every fight until nothing is dangerous, and Michael Toy, Glenn Wichman and Ken Arnold needed pressure that could not be waited out. Hunger was cheap to implement, thematically invisible, and it made continuing the descent mandatory rather than merely advisable.

Anti-camping pressure is the durable idea, and it still underpins survival and roguelike design decades later. Badly tuned needs are also among the most complained-about systems in that space, because a meter emptying faster than the world supplies food becomes an errand rather than a threat. Better implementations make eating incidental to something the player already wanted to do, such as cooking, farming or exploring.