"There is a conflict in every human heart, Freeman. Between the rational and the irrational. Good and Evil. Light, Darkness... Good does not always triumph."
Heart of Evil is a Half-Lifegamemod that takes place during the Vietnam War. While it seems to take itself seriously at the beginning, the mod slowly grows to out of the ordinary into something different.American MIKE Force soldier Percy Freeman receives his first mission: to find a traitorous Colonel by the name of Kurtz and kill him. But once on-location, things change for the worse. The US army suddenly grows hostile and decides to eliminate Percy, the Viet Cong and their North Vietnamese counterparts are no different, not to mention the hordes of zombies roaming and lurking through the jungles. With no ally but Barney and his fellow MIKE soldiers on his side, Freeman can do nothing but venture in the jungle, to fulfill his mission.The mod was remade six years later as Heart of Evil: Napalm Edition, which managed to make the experience even weirder.Compare with Shellshock 2: Blood Trails.
— Barney: "Those creatures out there, and not a living human to be seen. This whole town is gonna be like that. You want my opinion, sir? This mission is FUBAR. We are up shit-creek without a paddle. I miss my mommy."
Bittersweet Ending/Cruel Twist Ending: Kurtz kills Barney, who becomes a zombie. When Percy finally kill Kurtz, he takes the position as the new leader of the zombies. Mad with power, he lets the zombies take over the world. But hey, mission accomplished!
In the Napalm Edition, it's revealed that Kilmore killed Freeman, becoming the zombies' new leader. By this point however, the zombies had ran out of food to eat, dying from hunger, indicating that nearly all of humanity has been wiped out.
Black Comedy: It's quiet obvious that the mod, both the original and the Napalm Edition, doesn't take itself too seriously.
Body Horror: The zombies. And pretty much anything infected by the parasite-like things.
Expy: Freeman is Willard, Barney is probably Lance, or Chef (given how both gets decapitated), Kilmore is obviously Kilgore, the two officers who briefed Percy is Corman and Lucas, and Kurtz is... well, Kurtz, only his first name is Bob instead of Walter.
Face-Heel Turn: 1st Air Cav Sergeant Bob Kilmore, who flew the Percy to the mission, soon captures him and Barney when he finds out what their mission was about. Being a Sergeant, he ordered all the troops to kill Percy once he escapes.
Flanderization: The Napalm Edition of the mod made Barney even more clumsy, and your officer snaps into talking about food during your mission briefing.
Idiot Ball: Tossed between Percy and Barney, from Percy's walking into a obvious trap with Barney as bait, to Barney telling about their secret mission to the One Sergeant that is one Kurtz's side, and many more.
— Barney: "He said he wouldn't be my friend if I didn't tell him!"
Immune to Bullets: Napalm Edition made the zombies only killable using the chainsaw or explosives.
Klingon Promotion: Percy learns from a note written by Kurtz that the zombies get their new leader this way. Since Percy has killed him by that point, reading the note makes Percy suddenly mad with power and takes the position as the zombies' leader.
Large and in Charge: One of the generals early in the mod who give you your mission briefing is fat, and Kurtz too.
Large Ham: Barney became full of it in Napalm Edition.
You Have Outlived Your Usefulness: Late in the mod, Freeman finds out that MAC-V tried to get rid of both him, Barney, and the MIKE soldiers in the outpost via Kilmore.
— Lt. Col. Bob Samuels: This morning I had my last radio conversation with Command... There was a long pause and a whispered conversation which I did not catch properly. Then the guy on the radio told me in a hurried voice that backup would be sent very soon now - and hung up. We have been unable to establish contact with them since then. It is clear to me now that the generals want us all dead, and soon they will come to destroy us.
Xanatos Gambit: Kurtz. If Percy is killed by the NVA or the Viet Cong, he wins. If Percy gets bloated with bullets by Kilmore's grunts, he wins. If Percy dies in the hands of one of Kurtz's many zombies, he wins. If Percy kills Kurtz and takes his place as the ruler of the zombies, Kurtz still technically wins.