Starcraft: Insurrection by Aztec New Media
Playthrough: https://www.youtube.com/playlist?list=PLACFHAM2MlxNU1R5uBj4HDn9NZDlazW_8

An absurd cast of characters take part in a slow slog of a battle on a Terran colony.

Notes:
30 playable missions.

Not recommended on account of the boring missions and sluggish story execution that waste the player's time for what feels like eons.