The door is rusted shut. It also has no knob and isn't real. None of these doors are. What, did you think we'd let you in any of these doors? Fucking idiot.
This door requires an absurdly specific key only obtainable by doing an absurd puzzle. Why is everything in this building fucking locked?
Resident Evil 4:
Just kick the door in half. You don't give a fuck. Fuck this guy's house, it's my house now.
Go print out some words on a stone printer. They're like keycards. But rocks.
Rule of Rose:
Some little fucker is going to shut the door on you. What a prick.
I hope you like scrabble.
Dino Crisis 2:
It seems that someone misplaced a large vehicle into this door. Go find a key in a pond to open the other door.
Hey I hope you like doing silly puzzles because here's a clock, go ahead and input that time you read about earlier.
Left 4 Dead:
I mean, yeah, that door opens, but the hunter behind it isn't going to make things easier for you. Oops, it was just a horde.
Well that door's right fucked, innit? You see those boxes over there? You know what to do.
Same as above but with Mr. Struts on your ass the entire time.
If it's a locked door, you're gonna need a keycode. Hope you're ready to fight the burer behind it. The pseudogiant, too.
There's a lobsterman behind that door. Don't open it. Don't even open the sub door. There's lobstermen out there. Time to leave.
You're going to have to go into some guy's memories and make it so that he doesn't get dead to get through this door. Or maybe a bear's memories. Awesome.
OPEN DOOR. OPEN THAT DOOR. OPEN KITCHEN DOOR. OPEN DOOR. OPEN THE FUCKING DOOR AAAAAA JESUS CHRIST RIO PLEASE I BEG OF YOU OPEN THE DOOR
Echo Night Beyond:
Look through some really slow moving cameras until you figure out what you need to open the door, then proceed to immediately make a mad dash for the items while a ghost of a little girl kinda jogs towards you in an apparently immensely threatening fashion because your heart rate is literally breaking 300 bpm whenever she's within 3 feet of you.