中央研究院  |  資訊科學研究所  |  多媒體網路與系統實驗室
Detection of MMORPG Bots Based on Behavior Analysis
(NOTE: Sheng-Wei Chen is also known as Kuan-Ta Chen.)

Abstract
Game bots, i.e., autoplaying game clients, are currently causing troubles to both game publishers and bona fide players of Massively Multiplayer Online Role-Playing Games (MMORPGs). Use of game bots leads to collapse of game balance, decrease of player satisfaction, and even retirement from game. To prevent this, in-game polices, played by actual human players or game masters, often roam around game zones and individually question suspicious players, which is obviously laborious and ineffective task. In contrast to other work on automatic detection of MMORPG game bots based on the window events such as keystrokes, the game traffic, and the CAPTCHA test, <b>our research focuses on log typically recorded by game publishers for database rollback</b>. <b>In particular, our research is based on discrepancies in action frequencies and action types in the log between human and bot characters</b>. We propose the bot-detection methodology consisting of two stages, where in the first stage an unknown character will be classified as 'bot' if its frequencies of particular actions are much higher than those of known human characters, and the rest of characters will be classified by the support vector machine classifier based on their action types. We evaluate the proposed methodology using game log of a Korean MMORPG titled Cabal Online and confirm its effectiveness.<p> <font color="red"><i>Related paper: </i></font><br> - <a href="http://mmnet.iis.sinica.edu.tw/publication_detail.html?key=chen09_bot_traffic">Identifying MMORPG Bots: A Traffic Analysis Approach</a><br> - <a href="http://mmnet.iis.sinica.edu.tw/publication_detail.html?key=chen08_gamebot">Game Bot Detection Based on Avatar Trajectory</a><br> - <a href="http://mmnet.iis.sinica.edu.tw/publication_detail.html?key=chen08_manifold">Game Bot Identification based on Manifold Learning</a>

Materials
Citation
Ruck Thawonmas, Yoshitaka Kashifuji and Kuan-Ta Chen, "Detection of MMORPG Bots Based on Behavior Analysis," In Proceedings of ACM ACE 2008, 2008.

BibTex
@INPROCEEDINGS{thawonmas08:bot,
  TITLE      = {Detection of {MMORPG} Bots Based on Behavior Analysis},
  AUTHOR     = {Ruck Thawonmas and Yoshitaka Kashifuji and Kuan-Ta Chen},
  BOOKTITLE  = {Proceedings of ACM ACE 2008},
  YEAR       = {2008}
}