T-Rex just stands there.

[Akilaes]

T-Rex just stands there... took 30m of just shooting him with pistols to kill him. Have also had wolfs and bears do the same thing and just stand there stuck in an animation. Anyone else have this problem? How do I fix it?

[Perigryne]

I have never seen the T-Rex bug that bad, honestly it would have made me laugh if I saw that on one of my playthroughs. There's certain ways to abuse the enemy AI pathing with a lot of the creature mobs in this game. I tend to use them to speed up my progress through certain sections.
Its not a 'bug' so much as the enemy AI just being dumb and highly exploitable. Still got nothing on that T-Rex fight like you were describing though

[Akilaes]

I will load it back up to see if it happens again and if it does I’ll take screenshots. I’ve noticed that about the AI too that sometimes it will run into a corner or an object and not be able to turn around.
This is different though it doesn’t even move after his intro.
Also when I entered the big open area where you first meet the rapters they didn’t trigger. I ran all over trying to figure out what do to until I ran back into the cave that has the wall you slide down. When I steped out of it the second time the raptors triggered and charged.

[Darko the dog]

it happened to me as well, thats the way i beat him...it didnt feel rewarding but who cares.

[Grot]

Same for me, I had to go under his feet and get attacked to unstuck him

[Calmly Frenetic]

Several bugs in the game happen if the frame rate is too high.

Either enable Vsync using the game options, or use your GPU control panel to limit the maximum frame rate to 60 or 30 fps.

[The Fiend]

When fighting ground-based animals (e.g. wolves, bears etc) just jump on a platform and shoot them in the face. Like ducks in a barrel.