Alpha Protocol, a spy-themed RPG by Obsidian and probably their worst game. The gameplay was absolute garbage, but it had some of the best writing in games and your dialog choices actually affected the plot in dozens of ways. It was the first time I can remember since the old Sierra days where a minor choice you made ten hours ago could come back and screw you over.

In some ways it was the game that Mass Effect claimed to be, one that reshaped itself around your choices and let you lead the plot where you desired. It just sucks that in all other ways it was a buggy piece of crap, where everything from combat to stealth to hacking were miserable chores that weren’t fun even when they did function properly.