List the achivements which make you EXTREMELY PROUD

Holy shit, that Old School achievement really seems like hell. O__O

Overclocker

Complete Test Chamber 10 in 70 seconds

Not that rare, but still

Lol I'm not even remotely proud of any achievements I get, but oh well, gotta post something.

• Hexagon- Complete "Hyper Hexagonest" Difficulty- From Super Hexagon

Metro 2033 Last Man Standing "Finish the game in Ranger Hardcore Mode"

Saints Row The Third - You're My Hero! - Complete ALL Challenges.

Portal 2 - Still Alive - Complete Course 4 with neither you nor your co-op partner dying

Portal 2 - Talent Show - Never lose a cube in Chamber 6 of the Mobility Gels co-op course

Borderlands - What a party! - Collected 3 panties, 5 fish in a bag, and 15 pizzas

My Beat Hazard achieves for beating a 5 minute song on Suicidal, and surviving 15 minutes.

My Runner2 achieve for getting a perfect on every level. (I did it on Hard, too.)

And last but not least, beating SHODN's Boss Rush on Ninja Mode. Shit's hard. Really damn hard.

Sonic All Star Racing Transformed: Sega Superstar (100% it, so: get every single Star in Campain, get better times than the experts of the developers in ALL races, be first in 50 online games etc etc)...currently at 93%, but I will do it!

Little Rocket Man from HL2:Ep2. It was a pain in the ass carrying him through all those fights.

Platinum God! from Binding of Isaac. Maybe Achievement Whore from Hotline Miami.

Hate Plus

Cooking by the Book - Take an actual honest-to-god IRL photograph of the cake you're sharing with *Hyun-ae, and e-mail it to the developer! cake@hateplus.com

I tend not to feel pride over things like achievements. Maybe a bit of happiness or a sense of accomplishment, but not pride. The one in LA Noire where you have to pop those 3 guys through the car windshields before they get out was pretty fun.
My favourites were the Dark Souls 'cheevos though: the achievements basically just covered all the weapons/magics/covenants (so they weren't very imaginitive, but they encourage you to try all the game mechanics out).

I think my fav achievement is Coin-op Co-op (Complete a Coin-op cooperative game on normal or higher difficulty.) from Serious Sam HD: The Second Encounter. You had to complete the ENTIRE GAME in one sitting to get that. I think it took us about 4, 4.5 hours to get it done. Not even counting all the failed attempts until we realized that we had to do it in one sitting, instead of part by part.

All of my server first and this one

My favorite is Insane in the Membrane but I wouldn't say I'm proud of it xD

p.s. these are all World of Warcraft achievements/FoS for those who aren't familiar with it

p.s.s. also Hot Shot from SC2, which is finish a qualification round undefeated

Batman: Arkham City GOTY

I'm Batman

(Become the Bat)

I don't pay much attention to achievements most of the time. Only game I've hit all of them on for Steam is Day of Defeat: Source, was pretty proud of that one. I am going to try to hit perfect with Payday 2. Out of the ones I have, I'm probably most proud of stealthing completely through day 3 of Framing Frame and getting all the gold.

End Game in Secret Of The Magic Crystals.

related

Civilization V-Flawless Strategy-Beat the game on Deity difficulty

These are trophies but I'm really proud of: Unit 13 (PSV) 13-Star General- Obtain all Bronze, Silver and Gold trophies in Unit 13. Uncharted Golden Abyss (PSV): Charted! - Crushing - Finish the game in Crushing Mode. Persona 4 Golden (PSV): The Truth in Your Hands - Defeat Izanami It's actually not too hard, but the game is about 90 hours to complete, and about 200 if you want to max it out, AND understand the story. AND to be a Steam game here: Guncraft: Just Lose Already! - Raise your respawn timer in Onslaught mode to over a minute. This is really hard, because in Onslaught mode at least one memeber in the team have to stay alive, and you have to wait until you respawn, and by every death, it goes up 1 second. So it's about 30 minutes to conplete :D And I'm really proud of my Killing Floor seasonal achievements too :D

This one was one of the hardest to accomplish so far:

Ultimate Defender:

"You earned every Dungeon Defenders Accomplishment through the Eternia Shards Campaign! Trendy bows before your might!"

Aside from that, I'm rather proud of the games I've achieved every achievement (Just Cause 2, Borderlands 2, Thomas was alone, Alan Wake, Alan Wake's American Nightmare, Hitman: Absolution and Sleeping Dogs) or more than 90%...

"Apprentice: Reach lvl 5" in skyrim

Friendly -Gmod
Play with 10 friends

I thought you meant achievements in life. An achievement in a computer game isn't gonna make me EXTREMELY PROUD.

The ones you can see on my profile showcase (most of them anyway).

Order of Lenin for Dungeons of Dredmor. Only 0.78 percent of players have it :)