What was something you did in a videogame that made you cry, feel bad, or laugh really really hard?

I remember when i 1st played Bioshock i harvest the little sister and i swear i didn't know what it was but i felt so bad about it so i made a new game and rescue all little sisters.

Back in the days when mouselook was new to FPS gaming I trained my skills by trying to keep on top of other peoples heads in Quake for some good laughs.
*Edit: Oh, finding spots to trap yourself in Portal was fun, as the game humorously commented on trapping yourself if the authors of the maps took care of such situations. A bit like the "you're not supposed to be here" secret spot in Duke Nukem 3D ;)

For the feel bad part it has to be forced plot changes that go against my playstyle like having to kill bosses in Deus Ex: Human Revolution when I am on a pacifist playthrough.

I never felt the urge to cry or anything, but the death of Aeris in FF7 really stuck, even though it was completely unrelated to the players actions, so the answer might disqualify.

What made me feel bad?

4 words, Spec Ops: The Line.

Nuff said

Shadow of the Colossus had me going nuts on the emotional scale.

Spec Ops: The Line had me horrified at some parts.

Accidentally killing civilians or police officers in Sleeping Dogs.
I loaded my previous save every time despite it having no consequences outside of missions.

To me it was like it didn't happen if I did that.

I would get out of my vehicle and go check on the police officers if I saw them crash.
I'd open the doors, they'd fall out onto the ground, and then paramedics would arrive and pronounce them dead.

It was just heartbreaking.

Mafia (first one). All emotions in one game which impact even on toughest guys.
I never experienced something (not even similar) in any other game

Nothing made me cry, but limbo and some of those deaths had me saying 'Why? Why does it have to end that way?' The end of assassins creed brotherhood I believe it was, where you are after the Apple had a similar reaction. If you know the bit I mean, you'll understand.

I've laughed at a lot of stuff, mainly from just cause with its ridiculous car physics. A few glitches have made me laugh as well, the giant one in skyrim for example... some of the portal / portal 2 parts were quite amusing as well.

Dark souls: Prepare to die edition (cracked version cuz im poor as fuck and i cant afford my favorite game in the world) Solaire helped me the whole game as i like to call him Brolaire and in Lost Izalith poor man loses his sanity cuz of a bug that looks like the sun he was searching "Sunlight Maggot"

Call Of Duty : Modern Warfare 2, killing Russians innocents in the airport.

I guess Spec Ops made me feel bad, also Portal 2 made me laugh every now and then.... Not "really really hard" though

When Ezio's family was killed.. that almost made me cry.
Nothing else than that.. I kill everything with a big smile on my face.

The end of red dead redemption nearly got me crying.

There are several games that have actually made me cry. Only one has made me laugh repeatedly, however, and that game is Castle Crashers. Plants versus Zombies had some funny parts, too.

In Spec Ops : The Line. SPOILER : at several points I shed some tears. Like for example the part when you harm civilians and find them burnt, holding each other. That is memorable and horrible.

When ghost get killed in MW2..and MW all together had some sad moments,seeing your friends allies/ even yourself getting killed.
Fun kill would be in GTA series - Hooker kills - After some 'fun', I get a total refund :P

Max Payne 1 & 2, Alan Wake, Bioshock 1 & 2 happy endings (I'm playing Bioshock Infinite, not done yet), etc.

I don't want to be a spoiler, and people playing those games will know what I'm talking about.

One thing that made me laugh really, really hard was playing Surgeon Simulator and just dropping the drill into the patient's intestines. The drill bit gets caught in the intestines and the entire drill just spins around until it eventually gets loose and falls out. Sometimes you can get it to stay for a while and it's just hilarious to watch.

TellTale's The walking dead had alot of good moments

To The Moon has made me cry. Surprised no one has mentioned it yet...

No game made me cry o.o Im a heartless son of a bitch

Lost Odyssey I never got past disc two because it was so depressing and sad plus with the emotional state I was in at the time having to actually take part in a funeral in a game really shocked me I cried many times during this game and I'm not afraid to admit it and with this being 5 minutes into the start I knew I was in for a very very depressing and sad story on a grand scale but stuck it out till at least disc 2.

I felt a little bad when I sold my companions into slavery in Planescape Torment.

killing the zombies in deadly premonition because they scream at you that they don't want to diiiiie and it sounds so sad :(