Factual error: The "hard suits" the divers wear have soft, relatively normal gloves and soft joints. More akin to a football uniform with armor over spandex. They are at the bottom of the Mariana Trench, at 36,0000 feet below sea level. The pressure is over 7,000 psi. Without a hard suit, they would instantly be crushed.
Factual error: The soldiers had 506 Regiment's helmet markings of the 101st Airborne, and on their sleeves the 82nd Airborne and 1st Division shoulder patches.
Factual error: It is later revealed that Detective Banks partner faked his death by killing a meth-head junkie with the same tattoo as him. He included the junky's filleted skin with the same tattoo in a box with his badge to make it look like the other kills. Police, firefighters, first responders all provide DNA into a data bank to be identified in case something tragic happens and their remains are recovered. William Schenk's DNA would not have matched that of what was in the box.
Suggested correction: William knows that the cops will find out that he's not really dead one way or another. After all, he literally confronts Zeke and reveals he's still alive, knowing there's a good chance Zeke wouldn't take his offer to join him. All he's really doing is throwing off the cops and buying himself a few days when they think he's dead. (Since it can take a few days for DNA analysis to happen.) By the time they figure out he's not dead, he'll have already finished his game and disappeared. Which is ultimately what happens... he finishes his final game with Zeke and Marcus, then gets away.
Factual error: Apex, played by Robert Maillet (a retired professional wrestler 6'11" and 350 pounds), forcefully slams Becky (played by 5' tall fifteen-year-old Lulu Wilson who probably weighs under 100 pounds) horizontally with her back hitting the ground from waist-high yet Becky is able to get up with no incapacitating injury that would be expected. Becky also manages to brutally kill him (as well as the three other neo-Nazis).
Factual error: Two of the gunners are Privates. The minimum rank for aircrew was Sergeant.
Factual error: The car's cigarette lighter pops out (ready to use), and Bo exits the vehicle carrying the still-lit lighter, glowing like a flashlight. Nearly a minute and a half later, the cigarette lighter is still fully glowing - but car cigarette lighters only stay lit for a much shorter period of time. (01:20:00 - 01:21:23)
Factual error: There's a scene where the mother shoots an oxygen tank, which explodes, to kill an alien. A bullet shot by a pistol doesn't have the power to penetrate an oxygen cylinder. This has been tested with guns of various types. Even a .44 Magnum was only able to dent the cylinder. It took a .338 Lapua Magnum rifle cartridge to penetrate the cylinder. Even then, the cylinder didn't explode; it just "shot flame" from the exit hole.
Factual error: The force with which Paul thrust the knife into John's stomach, plus the amount of time that the knife was digging into John's stomach as Paul suspended him against the wall, would cause a severe, incapacitating injury - or death. John should have been rendered incapable of even crawling along the floor, but he managed to get up soon thereafter and chase/ fight with Paul in the woods. Miraculously, John also did not seek or undergo any treatment for the stab wound. (01:14:14)
Suggested correction: Whether he should have died is entirely dependent on if he hit any major arteries or organs. Being stabbed in the gut is not an instant death sentence. Additionally, he's running on adrenaline and shock... there have been numerous times someone has been shot or stabbed and been able to run away or fight back in real life. Also, he literally fainted before he could seek out medical treatment, so I'm not sure what your comment about "miraculously" not seeking medical treatment is about. That's 100% conjecture on your part. And conjecture based on no evidence is not a mistake. Obviously he was given medical treatment after he passed out.
Factual error: When Chul-min is shot by Sergeant Hwang, it takes only a couple of seconds for him to die. The bullet hit Chul-min on the left-hand side of his upper chest and was only shot once. No human being on the planet can die from a single bullet wound to the chest that quickly. It would have taken a couple of minutes, maybe even longer, for him to die from that. (01:20:35)
Factual error: The "real" Croatian license plate on the truck is only vaguely similar to the actual plates. Real plates start with a two letter city code, three or four numbers and then two letters.
Factual error: Trevor was driving ECTO-1 at over 60 mph. Podcast was driving the remote car and it was pulling away from ECTO-1. There is no way that the remote car could be going faster than ECTO-1, unless it was souped up, which it didn't appear to be when looking at it.
Suggested correction: There are plenty of RC cars on the market right now that anyone could buy that are capable of going 60+ MPH (the fastest can hit about 100 MPH). And if you take them apart, they don't look "souped up" at all. They just look like regular RC cars inside. Components don't have to look fancy to function fancily. You also have to account for the fact that the movie is highly fantastical, so there's no telling what kind of technology the RC car uses... for all we know, it could be nuclear-powered like the proton packs.