Beating Teenage Mutant Ninja Turtles on NES. The Ultra game that was weird and hard as hell. Also winning 10 ranked matches in a row in USF4. Had to beat 2 B+ ranked fighters and a A ranked Geif to do it. It was beyond intense.

I'm pretty proud of Platinuming the last of us, and being damn good at COD4 (3.25 KDR). I remember my party mates and I were getting trash talked by some clan in S&D, and we stomped the hell outta them. I got a clutch in there as well.

It isn't the hardest I've done but 1 credit clear Shadow Over Mystara beating the optional red dragon boss.

I used to be proud how good I was at driving games, my neighbours admired my skills too. Until I tried one multiplayer racer last year. I'm still proud how virtuoso I was in the original Carmageddon.

Beating Metal Gear Solid 2: Sons of the Patriots on european extreme

silver surfer no death run and the tons of fun it was getting it to save in windows movie maker....damn thing crashed so many times

On top of my head:

The Evil Within

	You Asked For It	60
Finish the game on 悪夢(AKUMU) mode.

Dead Rising

	7 Day Survivor	20
TYPE: 1 Play REQ: Survive for at least 7 days.

Dark Souls

	The Dark Soul	50
All achievements completed. Congratulations!

Dead Rising 2

	Zombie Genocide Master	20
Kill 72,000 zombies.

Braid

	Speed Run	15
Complete a full speed run of the entire game, beating the challenge time.

I completed The Binding of Isaac: Rebirth, I now have The Real Platinum God achievement and can rest easy until the Afterbirth expansion comes out.

Either the last boss of Drakengard or Drakengard 3.

Also got a lot of pride out of being #1 on the Hero v. Hero leaderboards for LOTR:BFME 360

First thing that pops into my mind is the platinum trophy for Gran Turismo 5, a whole lot of time and dedication put into that.