Alright, enough blog posts about APB recently. Here's something different. This story takes place - uh... a long time ago - in Morrowind (duh) on the original Xbox (unfortunately, those loading times sucked).
I traveled north from Vos, on some long forgotten mission. As I neared the sea, a fantastic Deadric ruin appeared on the horizon. I was a spellsword, primarily a mage but often reliant on my powerful summoned dagger. I had stolen a full set of priceless glass armor from the Mage's Guild by magically picking the lock, slowly loosing loyalty with them as I rose in rank with House Telvani. I felt unstoppable as I neared a mysterious Deadric ruin for the very first time.
Among the spires roamed a few of the ruin's inhabitants: Scamps and the dinosaur-like Clanfear. Smiling, I summoned a Clanfear minion of my own before casting a fireball at the nearest monster guarding the ruins. Summoning my dagger I charged in, and before long I was once again alone, standing at the entrance to the ruin.
With a deep breath I entered the ruins. Before me the path spiraled downward. As I rounded the corner a Dremora blocked my path. I efficiently dispatched of him. So far this didn't seem so bad. Finally I reached the bottom of the ramp. Before me the path was covered with water, but what took my breath away was on the other side. A massive statue of a Deadra Lord rose before me. I was only brought back to reality when a spell whizzed past my head, cast by an angry Deadra worshiper.

I quickly crossed into the room and took out the worshipers. Finally, the Deadric treasure stash was mine! If only it was that easy. As I lifted a Deadra Heart from the alter I heard a noise behind me. Turning, I swallowed as I realized a Dremora Lord had just appeared in the room, and he didn't look happy. I was running low on resources and I knew that this would be the most formidable challenge yet. Bravely I cast every spell I could and quickly slashed with my dagger. The fight seemed to go on for ages. I was almost continuously chugging my ever-dwindling supply of health potions. When it seemed like it was all over, the killing blow connected and the Dremora fell to the ground. I cautiously gathered the rest of the treasures and left the dungeon. It was not an experience I would soon forget.
This is an example of true immersion in a game, something that seems to be getting rarer these days - as much as I played Oblivion, I never had an experience that approached this one. I never did 'complete ' Morrowind, mostly due to very long loading times on the Xbox, though I have now been slowly making progress back through it on the PC.
Comment Question: Have you ever been *really* immersed in a game such that the experience almost felt 'real'?