There is only three modes:
Exhibition is a cut-and-dry one game affair.
Season can be expanded across a full season with your chosen MLB team; you won't be able to tweak player line-ups.
Post-Season, it automatically puts you in the chase for the Pennant. Be sure to check all of these out, as they offer some great fun for baseball players.
Tactical, beautiful, and wholly unique, the GOTY-winning sci-fi RTS returns with Homeworld 3. Assume control and battle through fleet combat in dazzling, fully 3D space while the award-winning story unfolds on a galactic scale.