Starcraft: Retribution by WizardWorks
Playthrough: https://www.youtube.com/playlist?list=PLACFHAM2MlxM5nQ--U-6azenx-HKjQKtG

Three warring factions clash with eyes set on an ancient macguffin.

Notes:
35 playable missions plus 4 bonus missions and several multiplayer/co-op maps.

Recommended for players who want an example of mediocre, run-of-the-mill macro gameplay.