Each Player will have a Special Rogue Faction Base adjacent to their own base. This Rogue base may only be attacked by the player who's is attached to it.
To complete each Standard Stage the player must fully destroy the Rogue Base. This means all structures must be completely destroyed. The player may take as much time to do this as is needed with no restrictions on the amount of times they may start and stop an attack
Special Objective Waves.Some waves will have special objectivewhich must be completedin order to advance to the next Wave. No extra XP is awarded for completing the Special Objective. The Special Objective is described the following way by Kixeye:
The Special Units may be purchased during the event. As the player acquires XP they may at any time during and up to 48 hours after the end of the event, chose to spend it on one of the new Units in the Event Shop. Also available in the Event Shop are all past Event Units with the exception of the Units form the Event that immediately preceded this one, Operation: Archangel.
The Event ends in one of two ways for a Player. First, if the Official Event Clock expires. The event runs for a limited time of 5 days after which time the Special Rogue Base will be removed from the map. Second, the Player reaches a Stage that he or she can not defeat thus forcing them to resign from the Event.
Starting at the completion of Wave 15 the player receives 20,000 Thorium. From there every wave adds 1,000 additonal Thorium. Wave 16 = 21,000, Wave 17 = 22,000 Thorium and so on.
This is the first event to give out Thorium for the completion of waves. (Note: The Thorium is not always listed on the end resource card, bug)
Halcyon is the second event with a Progressive Event XP Award. The Player receives 200 XP for the first wave. Then for each wave completed after the Event XP Award is increased by 20 to 30 XP until the maximum 1300 eXP per wave is reached at Wave 40.
Unlike in Archangelwhere the occasional Secondary Objective (Destroy Helipad), if completed, would give the player extra XP, The Secondary Objective in Halcyon does not give extra XP and furthermore it must be completed in order to move on to the next wave.
This is the first Event to offer a Schematic as a prize. Schematic's allow the player to Customize an additional Unit Type in the Workshop to the ones already available, in this case it adds theGatling Truck.