Methods and devices are provided for detecting and/or preventing cheating in online gaming. Some implementations provide gaming information in formats that are difficult for a bot to interpret, but which are preferably easy for humans to interpret. Some implementations of the invention involve the tracking and analysis of players' gaming activities. Some implementations of the invention provide a multi-tier approach to data analysis. Some analyses may be performed, for example, by a centralized computing device such as a server, whereas other analyses may be performed by a host device. In some implementations, “challenge and response” measures will be employed. Some implementations of the invention involve detection and prevention of collaboration between players.