Easily one of the best and well done WTF?!?! moments: Battle of Bruma in Oblivion.
For those that may have just emerged from a rock and never picked up Oblivion, let me lay the scene of the epic battle:
although, idk why you haven't played this game yet
Portals to the underworld, or in this case named Oblivion, have been popping up all across the land (and with the scale of oblivion's map, it's a big deal). Earlier in the game, literally in the first moments, you watch the agents of Oblivion murder the emperor right in front of you. From there, you spend quite a while finding and relocating the new found heir to the throne, collecting information on the new faction which seek to destroy the world, and a lengthy fetch quest to gather the items needed to open a portal to track down the faction's leader.
Then you get it, the precursor to war: the "gather the forces and recruit allies" quest. Ask anyone who has beat this game or at least made it this far and you'll see the spot in where they use to have hair but ended up ripping it out because of how long and tedious this quest is. You must travel to each of the 8 (i think?) major towns and recruit their soldiers to join the fight at Bruma. None will just be a good ally and give troop support; each town will have their own set of oblivion gates that need to close before they give help. I may have shut 15 gates for this quest, each gate taking a good 10 or 15 minutes.
After I come back from my many fights, the game really starts to pick up and you really get the feeling of 'shit's about to go down'. It's in this reguard that the game may do the quiet before the storm the best I've seen a game perform to date. You return to the town of Bruma and ACTUALLY SEE the re enforcements gathered in the town, each having their own tents. As you pass the encampment, you head up the hill to the future king to let him know the allies are gathered and that, in short, you're ready to tear shit up. He gives you the OK to let the countess of Bruma know the battle is coming.
Then you see it, The great Gate to Oblivion. This gate is nearly 10x the size of a normal gate to oblivion. You literally turn your head from the fight and just see this towering portal to hell and you literally just shit bricks. I won't go into what happens in the portal, but you can only imagine. I already gave enough of a spoiler away, so buy the game and play it for yourself. I promise you will not be dissapointed.
As you walk to her keep, the soldiers greet you and you even see some militia men wonder the streets. You tell her of the incoming battle and she unwillingly accepts the incoming doom. She asks to meet with the new Emperor and run over the battleplans again. As you meet with the new emperor again, he literally starts to become the badass an Emperor should be. He literally switched from his monk robes to an intricate, ornate battle armor that literally came from nowhere. HE walks with you, I'll repeat that, he walks with you (as in no cutscenes) to meet the countess. As he walks, people in the streets come and talk about the new emperor walking through the streets. As the two converse infront of you in the chapel, you literally feel the weight of everything getting ready to explode as now the anticipation of a massive fight is about to take place. As she signs the town over to the new Emperor, he turns to you and literally tells you things are about to get crazy.
From there, you leave the chappel and walk towards the battlefield, the citizens lining the streets to cheer you on as you walk. Also a thing to keep in mind, EVERYTHING IS NOT A CUTSCENE, ACTUAL GAMEPLAY! We head down to the battlefield and the men stand in a line. This is where things really get epic. Like Aragorn from Return of the King at the Black Gate, the Emperor walks infront of his men and gives a fairly inspiring speech, all in real time.
Then the battle actually begins. The first portal opens and the usual enemies come out. Not too bad yet, depending on if you actually took the time to gather the re enforcements. Then the next gate to oblivion opens, still not exactly a WTF moment yet, but you can defently feel it coming up. Finally a third gate opens and the full battle comes. There are men dying left and right, surrounded by all sorts of enemies