Civilization II: Test of Time is a variant of Sid Meier's Civilization II (without Sid Meier's involvement) which comes with a redesigned interface, overhauled graphics, and three new scenarios spanning 10 worlds set in the Centaurus Star System, The Universe of Lalande 21185, and The World of Midgard. Like the Multiplayer Gold Edition, it is a 32-bit Windows application which includes Internet and LAN multiplayer capabilities for up to 7 players.
Catfish's Cave (Fan resources for Civilization II: Test of Time. Excerpt of site content: Information on how to play the game on modern computers (64-bit), an extensive feature comparison table of Civ2 versions, self-made fantasy scenario.)
Eyn's World (French) (This site focuses on scenarios, not only for "Test of Time", but also for the original Civ2 and the later incarnation Civ3. Has tools and instructions on scenario creation and ready-made ones for download. )