Gundam: The Battle Master is the first game in the series, released for the PlayStation in 1997. Even this first game features the large multi-jointed sprites and 2-screen-high stages that the rest of the series would follow on. It includes the following mobile suits from the Universal Century era:

Playable

FA-010S Full Armor Enhanced ZZ Gundam

MS-06F Zaku II

MSM-03C Hygogg

MSN-02 Zeong

MSN-04 Sazabi

NZ-000 Quin Mantha

PMX-003 The O

RX-78-2 Gundam

RX-78GP02A Gundam Physallis

RX-93 Nu Gundam

Bosses (Non-Playable)

MA-08 Big Zam

AMX-002 (AMA-X2) Neue Ziel

Psyco Gundam Mark III

Hydra Gundam