Journals fully focused on simulation

• Simulation - Transactions of the Society for Computer Simulation
• JOS - Journal of Simulation
• SIMPRA - Simulation Modeling, Practice and Theory
• IJSPM - International Journal of Simulation and Process Modelling
• TOMACS - ACM Transactions on Modeling and Computer Simulation

Journals that often contain simulation papers

• Interfaces (Informs)
• IEEE Transactions on Systems, Man and Cybernetics - Part A: Systems and Humans
• IEEE Transactions on Systems, Man and Cybernetics - Part B: Cybernetics
• IEEE Transactions on Systems, Man and Cybernetics - Part C: Applications and Reviews

Journals focusing on gaming

• Simulation & Gaming
• IJGCMS - International Journal of Gaming and Computer-Mediated Simulations
• IJCGT - International Journal of Computer Games Technology
• Entertainment Computing (Elsevier)
• TCIAIG - IEEE Transactions on Computational Intelligence and AI in Games