Conflict resolution in asynchronous multiplayer games

A method and system to host a computer-implemented multiplayer game includes functionality to identify and resolve conflicts resulting from asynchronous game play. Client system game state information that changes responsive to in-game actions performed on a client system is intermittently synchronized with authoritative game state information, during which the in-game actions may be validated. Actions that fail a prerequisite check based on the authoritative game state information are analyzed in automated fashion to determine whether they are redundant actions that fail the prerequisite check owing to their having been performed with respect to outdated client system game state information. One or more remedial actions are performed for respective redundant actions, e.g., by allowing the redundant action and modifying the game state, by restoring spent resources to affected players, or by disallowing both the redundant action and an associated preempting action.