Effects › Structural
Replayability
Variation across plays that sustains interest.
20 mechanics carry this tag.
Achievements
A list of named goals, usually kept by a platform rather than by the game's own rules, records each one when its condition is met in play and adds it, often with a point value, to a persistent profile shown to others.
Branching Dialogue
Conversation is presented as a tree of authored lines in which the player selects from a set of responses, and each selection decides which lines, information, or consequences follow.
Deck-Building
Players start with identical weak decks and improve them during play by acquiring cards into their own draw pile, so each purchase changes the distribution of future hands.
Difficulty Settings
A rule-level parameter, chosen before play or adjusted by the system during it, scales enemy strength, resources, or margins for error so that the same content can be played at several levels of challenge.
Drafting
Players select items in turn from a shared pool or from packs passed around the table, so that each pick both builds a private holding and removes the item from everyone else's options.
Equipment and Loadouts
Before or between engagements the player selects a limited set of items, weapons, or abilities from a larger pool into fixed slots or under a budget, and that selection defines what the character can do until it is changed.
High-Score Tables
A machine or service keeps a ranked list of the best final scores achieved on a game, usually with a short name or initials entered by each scorer, and shows it to later players as targets to beat.
Level Editors
Players build playable levels inside the game from its own palette of pieces and rules, test them, and save or publish them so that they or others can play them as ordinary play spaces
Lifepath Character Generation
A character is created by stepping through successive periods of a prior life, choosing a career or event at each step and rolling for its outcome, so skills, assets, age, and sometimes death accumulate from a generated biography.
Morality Systems
The game tracks a character's ethical standing on one or more scales, moves it in response to the player's actions, and gates abilities, content, or endings on where the character stands.
Multiclassing
One character combines the kits of two or more classes, by taking levels in each class or by pairing two masteries, so that its capabilities are the sum of what each class grants at the level reached in it
Multiple Endings
A bounded story has several authored conclusions, and which one a player reaches is decided by accumulated choices, tracked flags, or a final decision, so the ending is a readable record of the path taken.
Procedural Generation
Maps, dungeons, encounters, or other content are assembled algorithmically from random inputs at play time rather than authored in advance, so each session presents a different arrangement.
Random Tables
A die roll indexes a prepared list of outcomes to generate an encounter, event, or detail at play time, so the content of a scene is selected from an authored distribution rather than chosen.
Random Upgrade Offers
At set points in a run the game draws a small random selection of upgrades, usually two to four, and the player keeps one, so a build is assembled from choices among offers the player did not set
Reputation & Factions
Persistent numeric standings track how each of several in-game groups regards the player, rising and falling with the player's actions and gating access, prices, hostility, and story branches.
Roguelike Meta-Progression
Currency or unlocks earned during a run survive the run's end and permanently expand what later runs start with or can contain, layering persistent progression over permadeath.
Seasonal Leagues
A live game periodically opens a temporary parallel realm in which all players start new characters in an empty economy under new rules or content; when it ends, characters and items move to a permanent realm and a new season begins
Subclasses
Within one class, a character takes one of a short fixed list of branches at a set level or on completing set content, and the branch grants its own package of features at later levels of that class
Variable Player Powers
Each player begins with a different rule exception, capability set, or faction that breaks the symmetry of the shared rules, so the same situation offers different options to different players.