I really like it too, it just fits with people who play online games.
you forgot the “x”
Why not? It’s not console based cheat but isn’t using exploits some kind of cheat?
It would have been an overused cliche’ if I had called the achievement :“HAAX!”
https://www.wiki.blackmesasource.com/File 
rotected.png
https://www.wiki.blackmesasource.com/File:Semiprotected.png
Meh, thought there would be. Too much F.E.A.R?
I don’t understand why you people keep posting suggestions. I’m fairly certain I recall seeing more than one developer explicitly state that any achievements and easter eggs that get suggested will categorically not be in the mod. That means the more good suggestions you come up with, the fewer good ones remain undiscovered to go into the mod.
I’m pretty sure the devs are just disregarding suggestions altogether. What you said would be ridiculous.
What you say is reasonable, but at the same time, if the developers incorporate any suggested achievement idea, somebody is going to be jumping up and down saying, “Oo, oo, look at me! They picked me! Windows 7 was my idea! Yeah!” I guess in the big picture, that isn’t such a big deal, but I could see it being motivation for the policy I think I recall reading.
Contract on the Hitman-
Kill every Assassin in the game.
I didn’t read the entire thread (60 pages how the f*ck I am going to do it in the short time I have before my father starts downloading again?) So I dunno if this achievements have been already said, but anyways:
Alien feeder: let a single barnacle eat 5 enemies.
Well done, Mr. Freeman: Complete the game two times choosing a different ending from the other.
Humans beat aliens: Kill 50 vortigaunts.
-(the achievements that I put after a - is because are related with the achievement seen before.) Taking the trash out of the lab: kill 100 vortigaunts.
-Godlike exterminator: Kill 150 vortigaunts and 150 alien grunts.
-Impossible game: complete the game without shooting, (does not count as shooting: rockets, crowbar, grenades, gluon cannon and use other npcs to do the work.)
Evading the boss: kill Nihilianth without entering into one of his portals.
Spy down: Kill an assassin while you are standing still in hard difficulty.
Unforgiven: Destroy Magnusson’s lunch.
Peacemaker: complete the Xen levels wich came before Gonarch Lair’s without killing any alien.
Fire down!: Make an exploding helicopter fall into one or more a H.E.C.U. Soldiers.
Medic!: get healed by scientists 50 times.
Light in the darkness: complete the capture level without getting any hit by an assassin.
Shark bay: Kill an Ichthyosaur.
-Today’s lunch, fish: Kill all the Ichthyosaurs inside the Black Mesa research facility.
Sneaking behind: don’t get killed by the gargantua in Black Mesa or Xen.
Now you see me, now you don’t: throw a grenade to a group of three H.E.C.U. Soldiers wich didn’t see you.
-Gib party: Turn into gibs 50 soldiers.
How could I forget that year?: Kill 2009 enemies. (yeah you know what I am talking about, you can see it on the end of the black mesa trailer.)
Pathfinder: find all the G-mans.
Barney’s betrayed: Kill a barney while he was shooting an enemy.
From the Starting until the end: Complete black mesa source without any dead.
Alien brute force: Look an alien grunt throwing a H.E.C.U. soldier across a wall.
Heh, for mah signature I already have an achievement like it, it takes to long to put every single one I did…
About that… I listen to a podcast about Black Mesa, and they said, that they didn’t make XEN, but do some “travel back in time” - I don’t know if this is true, but that’s what I heard. Maybe it was the Developer Benter podcast.