Plot hole: When the sheriff and his deputy find the remains of Roy this is just a few yards away from Darren and Lizbeth's car. It's hard to believe that none of the five people in the paintball game came across the car or the bodies while they were all walking around.
Plot hole: After Jason is "shocked" back to life, Tommy gets into his grave and is trying to get the metal pole out of Jason. During this time, Jason is looking directly at Tommy while he's trying to get the pole out. And Tommy looks right at Jason a couple times, so he should know he's alive, But Tommy doesn't realize he's alive until he grabs him from behind.
Plot hole: Katie calls out that the game is over and Stan and Larry protest because no-one has seen Roy. Roy is not on their team so Roy's status doesn't matter to them. He is on the yellow team with Katie, and they are the only ones left so the game is over. Katie's response doesn't make much sense either. It doesn't matter if Roy is still out there or if he shot himself or got lost. Roy is on her team so the game is over. (00:23:50)