The NPCs that inhabit Defense of the Anceints 2 can make life more than difficult. They are broken in three types – creeps, neutrals and Roshan. They aren’t just random obstacles and ways to gain in experience for your hero; all of them give items that can be vital to your success. You will also always gain in game gold when one of them is killed.
They are NPCs which means that even if you have your team members around you when one is killed, only the person striking the killing blow is going to receive a bonus. One twist that the game designers have implemented is that with the exception of the Roshan, there is no getting rid of all the creeps and neutrals on the map. They spontaneously spawn and will always be wandering about looking to engage enemies in combat.
Creeps are mostly attached to protecting the Radiant or Dire towers that hold the ancients. They will be located in their immediate area of any defensive towers in the lane as well. What makes them a particularly difficult opponent is they spawn in groups. It is rare to encounter a creep alone and it is best to take them on as a team. The bonus rules apply as if they were alone and only the person striking the killing blow to one creep will receive a gold bonus. There is no special bonus for clearing a group of creeps and there is no way to stop their spawning.
Neutrals are found in the lanes, and in the jungles between the lanes. They do carry some items that are worth having, but killing them not only clears the way to the towers, it can also bring you a bonus of gold. Killing them isn’t easy, but it can be done on solo terms. One thing to be mindful of is that if you do kill a neutral in a team effort, the gold bonus will only go to the one that strikes the killing blow. That is just the game rule that is set for bonuses attached to killing NPCs. Don’t think that because you have cleared a lane of neutrals that there won’t be more, they spontaneously generate in the jungles and can wander between lanes. They have no real allegiance or boundaries.
Roshan is considered to be the big boss of the neutrals outside of the lane. While killing them isn’t going to do much to affect the behavior of the neutrals, the Roshans have valuable items that you cannot get otherwise and grants the team a lot of gold. When he is killed, the items drop to the ground and can be claimed like the Aegis of the Immortal and others. He will respawn every 10 minute and each time he will be stronger in order to scale with the heroe’s levels. I is not easy to kill Roshan because he is a powerful NPC, which makes sense because he has to be stronger than the neutrals in lane and in the jungle camps. You will have to team up with several other players and engage in prolonged combat in order to bring them down. It can be a good idea to negotiate who will get what once the Roshan falls.