Mine have been mentioned but it doesn't make them any less great.
-2011 Game 162. What an amazing night for baseball and the Orioles. I'll never forget clutch hitting by Davis, Reimold and Andino for that magical moment. Oh and Carl Crawford for playing an awful LF.
-5/6/12 17 inning game vs. Boston. The Orioles would play 18 innings later in the year out in Seattle but it was this extra inning affair that got me really excited about that team. I think I enjoy Marlon Byrd being thrown out at the plate in the 16th as much as I love Davis pitching.
-2012 Wild Card Game vs. Texas. I don't drink much but I had to have a few with that game as my nerves got the best of me. Great win and that champagne celebration never gets old.
-2012 ALDS Game 1. It was a cold, rainy night and I drove 8 hours to get there. I was scared it would be postponed and the drive would be for nothing but thankfully they got it in. The Orioles lost but the excitement of being there for the first playoff game in 15 years and sharing it with my brother (who may or may not have a part in this thread) was something I'll never forget.
-2014 AL East clinching game. Just a fabulous, memorable game. I was very thankful to MLBtv for broadcasting the entire post-game celebration. I was so damn happy for Nick Markakis.
-2012 as a whole. That entire season was magical from start to finish and it will undoubtedly go down as my favorite sports team of all time. It had everything. The excitement from game 162 the previous year carried into opening day, the cartoon bird came back, orange jerseys, unforgettable statue unveilings, extra inning crazyness, Davis pitching, Mark Reynolds gold toe at first base and otherworldly HR tear in September and countless Orioles Magic moments from a different guy every night. I made a picture/video homage to this wonderful year that I will now shamelessly plug here. I promise you will enjoy it.