This book constitutes the thoroughly refereedpost-workshop proceedings of the 4th International Workshop on Environments forMultiagent Systems, E4MAS 2014 - 10 years later, held in Paris, France, in May2014 as an associated event of AAMAS 2014, the 13th International Conference onAutonomous Agents and Multiagent Systems.

The 6 revised full papers presented together with 1roadmap paper and 7 invited papers were carefully reviewed and selected from 14initial submissions. The papers are organized in topical sections on connectingagents, environments, and humans; environments for complex and stigmergicsystems; virtual and simulated environments; and open agent environments andinteroperability.