Playing games with OCD - It pisses me off.

[Camera]

If there is a game where you find chests (Some kirby games for example) I MUST find them all!

I also hoard items/currency and store them whenever possible.

Urge to keep all allies alive in case if I need them for special endings.

Filling out monster encyclopedias.

Having max hp/mp when engaging a new area/boss/fight.

Avoid harming dragons if possible.

Shove permanent stat increasing potions on favorite character.

Collecting a rainbow array of weapons of each kind.

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[Night Fox]

I used to do a lot of things in eights, but then I stopped being stupid and grew up

[Jokey365]

Oh, and if I'm playing an RPG.
Just finished a battle?
MUST.
GO.
HEAL.

[Night Fox]

in games like fallout, I try to go without healing with food or medicine as much as I can, and use water sources or something instead
I spend unusual effort on figuring out the most cost-effective way to heal, as well

[Lando The Climber]

This

[Eluxsam]

I ALWAYS have to do things in even numbers, 2s if possible.

[Wynd_Fox]

I have to reload constantly, and I have to have my volume on an even number.

[xxxxkill]

in games like fallout, I try to go without healing with food or medicine as much as I can, and use water sources or something instead
I spend unusual effort on figuring out the most cost-effective way to heal, as well

I have like, 90 something stimpacks in Fallout 3, simply because I try not to use them unless I'm in the middle of a battle.

[Deceius]

I used to reload all the time. Fixed it by telling myself I can only reload if the mag has under 10 shots left or is less than 40% on small clips.

[Katamari007]

i must do every single side-quest before I do anything else

[Dominator]

The only game where I have OCD problems is with Advanced wars. I seriously hate this game so much, just because i'm obsessed with getting a symmetrical battle formation.

Me on Battlezone 2 in a nutshell. I have to line up all the base buildings at the very back of the area and fill in gaps with gun towers/spires.

i must do every single side-quest before I do anything else

Looks like Assassin's Creed 2 forgeted you over then. It made me do all the main quests before I could go off and do anything else after a certain point.

I have to reload constantly, and I have to have my volume on an even number.

[Isjix]

OH CRAP

MY KEYBOARD IS MISSING A KEY AND ITS NOT EVEN IMPORTAAAAANT

^ me, i have 2 window buttons and i lost one and I still freakout over it

also dom that picture is me too

[TristanLuigi]

Health: 99/100
MUST PICK UP HEALTH BOX

[Dominator]

Health: 99/100
MUST PICK UP HEALTH BOX

I can moderate that if the health boxes are limited. You never know when you'll need it.

[Isjix]

I try picking up healthkits too even at full health