Esports

Organized competitive gaming at professional and semi-professional levels, structured around dedicated teams, coaching staff, regular league seasons, and major international tournaments with substantial prize pools and media rights. Esports encompasses spectator events watched by millions, professional player contracts, team ownership by investors and traditional sports franchises, and broadcast deals with streaming platforms and cable networks. The industry traces formal roots to the Cyberathlete Professional League (CPL, 1997) and South Korea's StarCraft: Brood War professional scene (late 1990s), where cable television broadcast matches to national audiences and players became celebrities. Modern esports are anchored by five dominant titles: League of Legends (Worlds tournament, $2M+ prize pool), Dota 2 (The International, highest prize pools in esports history, $40M in 2021), Counter-Strike 2 (CS Major Championships), Valorant (Champions Tour), and PUBG/Free Fire on mobile in Southeast Asia. Total esports viewership reached 532 million globally in 2022 according to Newzoo. The esports industry has faced structural challenges including team profitability, player career longevity (peak performance typically ages 18-25), and viewer growth plateauing after the pandemic-era surge. College esports programs have grown significantly as a pipeline for talent and a legitimisation pathway.

The numbers that describe the timing of every move in a fighting game, counted in frames, the game's smallest unit of time. The core values are startup (when the attack's hitbox comes out), active frames (how long the hitbox stays out) and recovery (how long the character stays committed after the attack ends). On top of those come frame advantage on hit and on block: a positive number means you can act first, a negative one means your opponent can. Capcom publishes official frame data for every Street Fighter 6 character on its website, with columns for start-up, active, recovery, hit and block. For example, Ryu's Standing Light Kick is listed with a start-up of 5, active frames 5-7, recovery of 11, +2 on hit and -4 on block. If a move leaves you at -4 on block, an opponent with a 4-frame attack can punish it; if their fastest attack is slower than that, the move is safe. Competitive players use these numbers to find which moves they can punish, which pressure is safe, and how to time attacks so their active frames meet an opponent getting up.

Multiplayer online battle arena, a subgenre of strategy games in which two teams, typically of five players each, compete on a structured battlefield. Each player controls one character with distinctive abilities that grow stronger as the match goes on, and a team wins by destroying the enemy's main structure: the Nexus in League of Legends, the Ancient in Dota 2. Computer-controlled units (minions or creeps) spawn in waves and march down set paths, typically three lanes, toward an enemy base guarded by defensive structures. The genre grew out of Defense of the Ancients (DotA), a mod created in 2003 by the Warcraft III modding community. Its designer IceFrog was hired by Valve in October 2009, and Dota 2 released in July 2013. Riot Games' League of Legends, inspired by DotA, released in October 2009 and is the world's largest esport. MOBAs also moved to phones: Honor of Kings (2015) had over 100 million daily active players as of November 2020 and is the highest-grossing mobile game of all time, and Mobile Legends: Bang Bang is particularly popular in East and Southeast Asia. Learning a large roster, items and team roles takes time, and the genre is known for a challenging learning curve for new players.

A competitive matchmaking mode in multiplayer games where wins, losses, and individual performance affect a visible skill rating or tier rank, designed to match players against opponents of similar ability over time. Ranked systems use various models: Elo (named after Arpad Elo, originally designed for chess) calculates a single numerical skill rating updated after each match; MMR (Matchmaking Rating) is a hidden internal version of Elo used by many games behind visible tier displays; and league-based tiers, Iron, Bronze, Silver, Gold, Platinum, Emerald, Diamond, Master, Grandmaster, Challenger in League of Legends, translate internal MMR into visible prestige milestones. Ranked modes serve several design purposes: they separate players who want competitive intensity from those who prefer casual play; they provide a long-term progression goal (climbing the ladder) that extends game engagement; and they create a meritocratic arena for skilled players who find casual matches too easy. Ranked modes are the foundation of esports talent pipelines, professional players are typically drawn from the top ranks of open ranked queues. Common ranked frustrations include 'elo hell' (the belief that a player is stuck in a rank due to teammates rather than personal skill), rank decay for inactivity, and placement match variance at the start of each season resetting accumulated progress.

A network synchronisation architecture used in fighting games, and increasingly other competitive genres, in which each player's game client locally predicts (simulates) the opponent's current inputs rather than waiting for those inputs to be confirmed over the network, then immediately 'rolls back' and recomputes game state if the prediction proves incorrect when the actual input arrives. The alternative, delay-based netcode, inserts an artificial input buffer of several frames on both players to allow network packets to arrive before processing, creating a lag-like sluggishness even on fast connections. Rollback produces online play that feels nearly identical to offline play even at 80-120ms latency, because the client never 'waits', incorrect predictions correct silently, and at typical prediction error rates the corrections are nearly invisible. The GGPO library (created by Tony Cannon in 2007) provided the first accessible rollback implementation for fighting games, and games using it, Street Fighter III: 3rd Strike Online, UMvC3, Skullgirls, demonstrated the quality gap versus delay-based alternatives. The modern rollback expectation for new fighting games was set by Guilty Gear Strive (2021), Street Fighter 6 (2023), and Tekken 8 (2024). Rollback adoption is not universal: some older fighting games still run on delay-based netcode because rollback implementation requires significant engine access, and retrofitting it to legacy titles is costly. Dead or Alive 6, while technically advanced in gameplay, still uses delay-based netcode, a commonly cited reason competitive players avoid it online.