Operation guide: 0-3
| Operation | Guide | Story |
0-3 is a step-up from the preceding 0-2 as this operation introduces Monsters for the first time. Monsters are flying units which can only be attacked by ranged units and move over ground units, and spawns from their very own Aerial Incursion Point distinguished from regular Incursion Points by a quadcopter sign on them.
Initially the player gets to face Originium Slugs and Soldiers spawning from C1, so deploy a melee Operator on C5 facing left to dispatch them, supported by a Sniper deployed on D5 facing left as well.
It is important to note that regular single-target/ST Snipers will attack aerial enemies over ground enemies, so the player don't need to worry if they have at least one of them at their disposal, since they will take care of the Monsters without much trouble. If the player still have problems, though, just deploy additional Snipers on C7 and/or C8 facing left.
For the Challenge Mode version, the greatly increased enemy HP means that one melee Operator and one Sniper is not enough to do the job, so the player must add more melee Operators and Snipers into the mix to deliver better DPS and take out the enemies fast enough before they can enter the objective.