Well that can’t be always then, can it? 
I’m being overly pedantic…
pedanticpedanticpedanticpedantic
i looked at the first page and now the 40th, but i can’t locate where exactly the derailing of this thread began.
from talking of achievements to trains… 
it sucked right from the first post, anyway.
Wise guy: Step into the RC the MOMENT the scientist in the control room says “get away from the beam!”
TIME PARADOX: Kill Kleiner or Eli.
These suck 
It’s hard to get 40 pages on a thread like this without numerous people trying to derail it. Why, even as I’m typing this, people are posting off topic nonsense.
THEN DON’T POST THEM :hmph:
Oh. My. God.
First, who cares? They are just little pictures that say you did something. The only person they’d be cheating is themselves. It’s about as pointless as buying a crossword book and going straight to the answers - you got no enjoyment or challenge from it, and no-one else in the world gives a shit if all the puzzles in your book are filled in or not.
Second, the whole point of achievements is to, you know, ACHIEVE them. It’s about giving you a few extra challenges to give the game a bit of replay value, and to give you a sense of, you know, ACHIEVEMENT. Some people need a sense of accomplishment.
Would it be weird to suggest an achievement to reference Freemans Mind by Ross Scott?
I’m not sure what but there is a lot of material from that machinima. like Power slide yeaahh - slide under trip mines.
X Counts of Self-Defence (X being all the soldiers you can kill in the mod)
would be a better reference.
Of course you can. Like:
The monkey god: Jump of the elevator on Blast Pit 1 second before it falls off.
I wan’t that one!: Get the shotgun for the first time only on the security room before the silo door.
This sort of things.
Also, Dias reference is a really good one.
Finish BMS…so we can play the game 
I GIVE UP spend half an hour on the same map looking for the door to the next level when its 2 steps to your right. (co-op no respawns till map changes the retard couldn’t find a button that ends the map. synergy.)
MG king. only use automatic weapons nad the crowbar.
HAXXXxXxXxxx… play BM on hard 3 times with out dieing once.
BILLY MAYS! kill a creature other than the tentacles with the test rocket in blast pit
now you’re thinking with portals get through the portal puzzle in Lambda core without cheating.
Mario Freemansurvive the jumping puzzles of the borderworld
your weapons cannot harm me, I’m the Juggernaut! go through the game without taking weapon damage (splash damage from own fired rockets/grenades/satchels/tripm ines counts)
Mind Over Matter: Where possible, prevent the military from killing any scientists.
Score 1 for Newton: Kill an enemy with a physics prop.
Dismental: Destroy every crate in Black Mesa.
Gauss Pad Gauss Jump in MP after using a bounce pad.
Bug report: Stomp 100 cockroaches.
See, those are examples of good achievements. No meme bullshit and the jokes are fairly clever. People, take note.
Chain and Cable: Kill two enemy soldiers by dropping a shipping container on them.
Finally, Answered Questions: Reach Xen.
Satchel Barge: Kill an enemy with a physics object, propelled by a Satchel Charge explosion.
Carrotvision: Complete Black Mesa without using the Flashlight.
Batteries not included: Complete Black Mesa without ever charging your HEV Suit.
BRING OUT THE BFGs get 4000 kills in MP with the experimental weapons,rpg, and on map turrets.
Not a Video Game: Don’t die. Ever. Also do not revert to any previous saves. (Does not count on Easy mode.)
Probably posted before, but why not… seeing as most of the achievements have been buried already.