This is a small bonus project as I prepare to release my other bigger Civ2 mods to the world! I recently rescued aland007's old Starcraft Terran War Scenario and it saddened me that it was heavily lacking in custom terrain.
Now that I can finally test it out I can see that aland007's Starcraft Terran War scenario was an interesting project with a number of unique changes designed to make the scenario 'feel' more like Starcraft. For example terrain now gives next to no shields forcing you to mine vents & crystal special resource spots like in the original game. Technologies and buildings have been heavily modified and reduced, however the biggest change has got to be his units system where every single unit appears to only have an attack & defense of 1 while their firepower and hitpoints have been massively increased instead resulting in much longer firefights that feel and sound more like Starcraft too. Balancing wise I'm not sure if that really works in Civ2 as by making everyone 1/1 you're really playing a game of chance even if your top units deal more damage and can take more hits eg I attacked a Goliath with a big Terran Battlecruiser space ship and I lost due to me constantly losing the game of chance, but nevertheless it's another thing that makes this scenario feel unique.
It's a pure Terran vs Terran (7 different human factions) scenario so no Zerg or Protoss sadly, however the bigger disappointment is that it doesn't have any custom terrain other than the special resources which really kills the designers intention of giving that true Starcraft feel.