But only one at a time? How for example would I get Environmentalist, Where Is EveryBODY?, and Silent Assassin simultaneously if one of the targets is the alcoholic at the tractor or the limping chess player? As far as I know it’s impossible without multiple shots, e.g. if you shoot the bottle the alcoholic drinks from he’ll move to another bottle close to a bush, but that prevents getting Environmentalist because you took more than five shots; I was never able to get him to move in front of a hiding spot naturally like some other targets. There seems to be at least one target in each area who does not move in front of a hiding spot unless triggered to do so.
Likewise there is severe RNG in the panic routines. If you light Paine on fire at the gun range in the first few seconds of the map you’re either totally fine or you have a gun range target fleeing, depending on whether the gun range/barn area was chosen to have one of the infected and whether they’re close to the accident. Same thing with explosions; sometimes you get away with it, sometimes it alerts 3 infected. You can still accident fleeing targets but that totally changes the dynamic and speed of the map in a way that can scuttle a challenge attempt in a very frustrating manner.
EDIT: There can also be RNG in spotting, Paine is sometimes noticed being shot into the first bush he passes by one of the leaf raking guys and sometimes isn’t, for example, and I know I’m taking the shots at effectively the exact same time because I’m slowing time with the Ghost and taking a shot in the same position.
Mind you, I don’t want to seem too critical (I like the idea and would love to see more Sniper Challenge maps), but if the solution is “any challenge can be completed, but only one at a time” that’s still kind of frustrating. It’s fun to shoot for multiple different challenges but if somebody were to try for an Environmentalist+Silent Assassin+Where Is EveryBODY run they’re essentially at the mercy of the gods and Diana in getting accommodating targets. Granted, that’s counterbalanced by being able to cheese the mission with saves maybe.