I have such a topic in a game forum, and I really laughed a lot
I think everybody who ever come to online, said or heard such a funny last sentences. Here is some, I hope you will like it

From lineage 2:

Eh, dont worry, I easly can take them out
By cobra, in a middle of raidboss party, when a full valley attacked us...

WTF? damn, I forgot to bring some more crys
By Me, in deep Lair Of Antharas

Hey, some more buff will be nice
By cobra, in LOA too

Hups, I forget to bring SOE
By me, inside Devil Island, and I was supposed to bring it

From JKA:

Noob, you will be never hit me
By unknow player when get a headshot

Would you kind enough to release the grip?
By unknow player, who was above a riff

From Freelancer:

Fuck, incoming missile
BTW, it was a torpedo, and taken out all of us

Hmm, I see two of them in a radar, wait a minute... what a hell...?
Yeah, and eighteen more, by Slayer

Whoa, a nomad battleship?
By me and that didt was so funny XD

Warning, mine fie...
ld the ending, by my computer At least Slayer and Cobra was behind me

Hey, did you see that in the lighting? Looks like a planet
By me, somewhere deep in a nebula. At least we find the planet, and I quickly reached the surface

Man, do you know a jumphole in this shit? At least we are safe here.
By me, before the last second when we got cleared from the sky

From Hereos 5:

Hmm, a group or archers, god, I can take them down...
Yeah, a little big group of archers, more then 2K Good old slayer

From SWAT 4:

Hey, there is someone in the stairs...
By Sid, who always die when a suspect is show up

Buci, let me see your gun
By cobra, and he standing front of me, so the suspect who came shot me down, and he too, because I cant shot

POLICEEE
By an unnamed suspect, and someone always die when someone screamed this word

Fuck, I bring flash instaid of CS
By me, and all of us weared gas mask, so we blinded by me when a happy suspect showed up (with sunglasses off course )

Homeworld 2

Hmm, looks strange. Let me bring a detector.
By slayer, when he found a whole army of cloaked battleship. Well, we wont last too long.

Dont worry, they will never found us in the nebula.
Well, they do. Here again. Belive me, the nebulas sux