Before the jump
The platformer's defining mechanic is the jump: a player character that can leave the ground and land on elevated surfaces. This sounds obvious, but the jump had to be invented. The first games with layered platforms — Space Panic (1980), Donkey Kong (1981) — used different approaches to vertical movement. Space Panic's player could not jump. Movement between platforms was achieved through ladders, and the game's mechanic involved digging holes in platforms to trap enemies. It was the first game with distinct horizontal platforms as the structural element of the play space, but it was not a platformer in the modern sense because it lacked the jump.
Donkey Kong (1981) had a jump, sort of. Jumpman — later Mario — could leap over obstacles but couldn't land on elevated surfaces from below. He moved up through ladders and fell through gaps. The jump was a defensive and traversal tool rather than the primary means of navigating the vertical space. The level design was about climbing up a construction site, not about navigating a three-dimensional landscape of platforms.
Pitfall! and the horizontal platformer
David Crane's Pitfall! (1982) for the Atari 2600 introduced a different model: a horizontally scrolling world where the player moved primarily left and right, with vertical obstacles — vines to swing on, logs to jump over, pits to cross — providing the challenge. Pitfall Harry could jump, and the jump was central to progress. The game scrolled the environment rather than presenting a fixed screen, giving the player a sense of moving through a continuous world rather than solving a discrete puzzle room.
Pitfall! is sometimes described as the first side-scrolling platformer. The description is arguable — it lacks the elevated platform structure that defines the genre — but the horizontal scrolling, the expressive protagonist animation, and the centrality of jumping to navigation are all components that Super Mario Bros. would use three years later. Crane was solving the same design problem — how do you make a character move through a variety of environmental obstacles in an engaging way — and arriving at similar answers through different means.
Super Mario Bros. and the grammar
Super Mario Bros. (1985) established the platformer's complete design grammar: a horizontally scrolling world with elevated platforms of varying heights, enemies that could be defeated by jumping on them or avoided by jumping over them, power-ups that modified the player's capabilities, a time limit that prevented indefinite cautious play, and a world structure that moved progressively from simple to complex while introducing each mechanic individually before combining them.
The jump in Super Mario Bros. was designed with unusual care. Mario's trajectory while airborne could be modified by holding or releasing the jump button — a longer hold produced a higher arc, a shorter hold produced a lower one. This made the jump feel responsive and controllable in a way that fixed-trajectory jumping systems didn't. Players who felt they had "missed" a jump in Super Mario Bros. were almost always wrong; the trajectory had gone exactly where the input dictated. The jump system was designed to accept the blame for player error while actually providing enough control to make errors the player's fault.
The genre's expansion
Super Mario Bros. established the model that most subsequent platformers followed or consciously rejected. Sonic the Hedgehog (1991) was built around momentum — the accumulation of speed and the use of that speed to navigate environments, making the physics model itself the primary design feature rather than the precise jump arcs of Mario. Mega Man subverted the genre by making the jump less important than combat — players navigated platforms primarily to get to enemies rather than as an end in itself.
The "Metroidvania" subgenre — non-linear platformers where new abilities unlock previously inaccessible areas — established that the platformer's layered world could be an exploration space rather than a linear progression. Super Mario World (1990) showed that the design grammar could accommodate enormous variety within a consistent set of rules. Rayman (1995) demonstrated that fluid animation and tactile physicality could be as important as level design. Prince of Persia demonstrated that realistic physics and animation could produce a fundamentally different kind of platform experience from the cartoon physics of Mario.
The jump as expression
The reason the platformer became and remains one of gaming's central genres is that the jump is an unusually expressive mechanic. It is physical in a way that most game actions aren't — it involves the whole body in imagination, not just the hands in practice. It is achievable — everyone understands jumping; nobody needs to be taught the concept. It is spatially meaningful — height, distance, timing, and trajectory are all variables that the player controls and that have clear consequences. And it is difficult enough to require skill without being so difficult that it excludes casual players.
The history of the platformer is the history of designers discovering how many different things can be done with those properties. The jump as survival (avoid the pit), the jump as combat (land on the enemy), the jump as exploration (reach the elevated area), the jump as expression (achieve a particular aesthetic arc), the jump as physics puzzle (calculate momentum to reach a distant platform) — all of these uses of the fundamental mechanic have produced distinct and valuable game experiences. The genre's durability is the durability of its core mechanic: the jump is simple enough to be universal and expressive enough to generate variety indefinitely.