I've been playing my first game of Sid Meier's Alpha Centauri. While the game is fairly enjoyable, I haven't been able to get my head around the tech tree. The game doesn't appear to be able to show the complete tech tree, unlike Civilization games, but instead only the prerequisite and the technologies which are next in line.
I'm playing the GOG version of the game, which only came with the manual and a reference card for the game's keyboard shortcut.