The HEV suit could tell you ‘Achievement unlocked’ 
That would actually be kind of awesome, as long as it was only audio input and not some lame-ass HUD notification. o.O
And my heart grew 3 sizes that day.
I AM OVERJOYED.
<3 Raminator. Pure.
I agree that having the HEV suit tell you you’ve unlocked an achievement would be a lot better than having something pop up. Though there’d have to be a separate voice clip for each and every achievement.
Teamwork: Complete one chapter in Co-op mode
Best Buds: Complete five chapters in Co-op mode
One Free Man My Ass: Complete the game in Co-op
I dont need your help-kill all the humans you need to progress FOR THE LAST TIME!-kill all the HECUs with an explosive
I want some cheeto`s…-blow up a vending machine
OH NO! NOT AGAin!-get killed twice exactly same way
I learned it the hard way-get caught by every single barnacle in the game
I understand Freeman’s Mind and Civil Protection are good… but does every single achievement suggestion have to be titled by one of his lines?
Two or three would be amusing, but retelling the videos in the form of achievements would get tiring really quick.
I think that some of the achievements should be given when a player tries to use an old glitch, like tripmine-stair making, or trying to get the scientist at the start of we got hostiles to open the door, attempting to press a switch from the wrong side of the wall, getting yourself locked outside of the rocket test area of blast pit, etc.
A good one would be killing the monsters that are near the explosives that blow up the bridges around blast pit, if you kill the monsters then the bridges don’t explode.
Achievement unlocked:
Deep in the action
Bravely leap into the tentacle pit
Edit: What about multiplayer ones?
Nuclear falldown
Get killed outside the bunker doors of crossfire by another player during the bomb explosion
I would personaly like an acivement where you had to find some item and bring it with you INTO the test chamber, and cast it into the big green laser before you push the cart in.
how about an achivment for finding g-man sightings
How would the game know if the player saw G-Man or not?
snapshot feature?
my brain… you’re killing it.
alive or dead-get killed after you survive a fight with at least 5 enemies with only 20 health points
electrified toxic waste-jump into radioactive sludge and get killed by a vortigaunt
half melted chocolate bar-waste all your mp5/m4 ammo on cockroaches in a vending machine
Were the last two Refrences to Shephard’s mind like every other achievement is a line from Freeman’s Mind?
well,I used Shephards mind as inspiration except for the last one and the first one
Rumor is co-op is a lie… When I asked about the multiplayer I was told DM, that was all
Achievements should be things the player has to go out of his way for, or keep conscious track of. The infamous gnome achievement is one of these things, the same for ‘get some grub’. In the first, the player has to babysit a gnome across two thirds of the game, and in the latter they have to compulsively hunt for every grub in the mines to get it.
Using the crowbar for most of the game is a good suggestion (up to the Nihilanth- Is it possible to crowbar him to death?) since it requires the player to suppress the urge to switch to another weapon. The ‘One free bullet’ is similar, since the player is only allowed 1 bullet in the entire run of the game.
Breaking every crate in the game might be another- but of course within reason. You don’t want to be smashing every crate in the explosives storage room, eh?
Similarly, stuff like ‘not detonating any tripmines’ or ‘never setting off a laser tripwire’ would also be worthwhile, since it would make the game harder on the players as they avoid shooting out the tripmines.
I guess another one I’d offer is blowing up both gargantuas without resorting to the ‘scripted’ ways to defeat them (electrocution, airstrike). Not sure if you’d have enough explosives at those points in the game though.
And I have to ask, were there ever achievements in Valve products given to players for dying in a specific way?
Magnusson’s lunch, obviously… or the picture of the baby in Gordon’s locker… or the thermos, or… hell maybe the entire microwave with mag’s lunch in it… that would be pretty cool…
You know what? how about a roll of toilet paper:
[secret]Might need this… - Bring a roll of toilet paper with you into the test chamber.
maybe something like
[secret]No thanks, I’ll walk - for every elevator possible before the resonance cascade, use the maintenance ladder instead of the elevator.