35 years ago, Frank Thornley showed me Command and Conquer. I was immediately hooked, and it became my favourite game for a long time. I continued through Red Alert, downloaded lots of missions, and it was great. But after several years, I moved on to Civilization.
But now that I can reliably win Civ at Deity level, I'm waiting for Civ version 7, which isn't even on the horizon.
I just rediscovered C&C. There's an open source version now, and it runs fine on Linux. I downloaded it, and clicked on it, and it just worked! I've done the first few missions, and I'm just getting used to the game again. I think there are some differences from the original version, especially in the user interface.
I love the combination of economic development and war strategy and tactics.
So, that's my Christmas sorted!