Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Tear Jerker: Left 4 Dead
In the recently released the Passing campaign, it takes this trope to a more personal level. We already knew somebody from the original cast would die, but when you see Bill's corpse lying right next to the power generator, still clutching on to his signature M16, you just can't help but break a tear.
And on "The Sacrifice", listening to the last lines on the titular sacrifice for each character is heartbreaking. Especially a lot of the surviving characters' parting lines, many of which sound like they're about to break into tears. Especially the reaction of either Zoey or Bill if the the other sacrifices themselves.
In the second game's Last Man on Earth mutation, it's just you and the Special Infected. As if the pants-wetting Paranoia Fuel wasn't enough, your character continues to speak as if the other survivors are still around. One particurly depressing example is in the Dark Carnival campaign while playing as Nick: "You finally got your wish, Ellis. We're in an amusement park ride."
Well Ellis doesn't at least. He'll yell out for the other occasionally. "Hey that's not funny, where are you guys?"
* Computer/C:/Program Files/Steam/SteamApps/common/left 4 dead2/left4dead2_dlc3/sound/player/survivor/voice/namvet and then nervouswhistle01. God-fucking-damnit, Bill.
In "The Sacrifice" comic, it is revealed that in Zoey's first encounter with the Infected, her mother was infected and bit her father, who was then forced to shoot and kill her. Zoey and her father then say their tearful goodbyes before she shoots him before he can turn into a zombie. What really gets the tears flowing (for both Zoey and the reader) is that Zoey flashes back to this moment when she learns that the gene for carriers is passed down from the father, meaning that her father was never going to turn in the first place.
Some of the final lines after Bill leaves the bridge.:
Zoey: He's gone, Francis.
Francis: You don't know that! Bill's the toughest old buzzard I ever met, and he's down there and he needs us! We—
Zoey: Francis. He's gone. He did this for us. And if you go down there, he did it for nothing.
Made even more meaningful that Francis and Bill were always the most hostile to each other, yet Francis is most determined that he's still alive.
Bill: Don't let her down, don't let her down....
To add to this, Louis' first encounter, which involves him being ambushed and being obviously terrified and depressed about the whole thing.
How about just the simple dialogue players say once their health is so low that the screen turns grey?
Zoey: "Oh God... I'm gonna die..."
Everyone's reactions to one of the party members dying, and you just watch, knowing that you could have saved them. Kind of moot when they just pop out of a closet a few minutes later, but it still tugs at you.
Ellis is normally extremely talkative and lighthearted about their predicament, but if Nick gets killed, a depressingly sad glitch may occur where Ellis doesn't talk at all until Nick is brought back, even while being ridden by a Jockey or pounced on by a Hunter.
A lot of the graffiti is this too, if you take the time to look at it. People apologizing to loved ones because they had to move on without them, people leaving mourning messages for lost friends or loved ones, messages to family members (one reveals someone telling a family member that they found Mom...she was crying in a ditch and killed their father when he tried to help her. She's one of them now.)
"Uh Ellis, you know I was just kidding about all that right?" The poor kid dying is bad enough, but Nick's responses to it are real tear-jerkers.
In the Sacrifice, Ellis falls head over heels for Zoey, and it's hinted that she feels the same. Then comes the end of the campaign, and she invites Ellis to go with her and her group. He says no, because he wants to stay with his friends, who refuse to derail their plan. Poor Ellis is heartbroken.
Okay, bit of WMG wit the way the survivors may be thinking but.. You'd probably think Ellis, Coach, Rochelle, Nick, Bill, Zoey, Francis, and Louis are all lucky to be immune right? Think again; these people may have seen their friends, co-workers, and family turn in front of them! Then, they have to uneasily group up with 3 other people who, at specific points in the story, don't know if they're immune! And even if the military doesn't shoot them when they escape, everything about humanity is gone and overrun with infected. They can never go back to their old lives! It's a miracle they don't shoot themselves so they don't have to deal with it all...
If any of your teammates are incapacitated when everyone else gets on the rescue vehicle, they will be left behind. As long as they're not dead, you'll get the sound of them screaming for your help playing over the cut scene of the rescue vehicle leaving, abandoning them to the zombie hordes. You will feel like an asshole.
Really sympathetic players will find this game full of Cry for the Devil moments, especially when you really think about it:
The Boomer doesn't even sound like a zombie, he just sounds like a guy who ate too many beans.
After the witch kills someone, there is a brief pause where she looks down and realizes what she's done. She then runs of crying again, clearly ashamed.
The Jockey can become this due to Alternative Character Interpretation. Some fans theorize that the Jockey was wheelchair-bound Pre-Infection. And the fact that he laughs even as he rips the flesh off your face is just heartbreaking in how messed up the Infection can make you.
The Midnight Riders' song Save Me Some Sugar, particularly after you have played The Sacrifice campaign and watched all those Bill Tribute videos on Youtube. Even worse if you take the lyrics to heart and just went through a breakup.