Transformers: Beast Wars Transmetals

In both games, players take control of one of the Maximals or Predacons in a 1-on-1 battle and attempt to deplete their opponent's life through the use of projectile and melee attacks. Each character can change between three different modes: a Beast Mode, a Vehicle Mode, and a Robot Mode. Players can battle against CPU opponents in each game's single player mode, or against a second player in versus mode. In the Nintendo 64 version, gameplay takes place in a flat 3D arena.

Each of the three character modes has different strengths and weaknesses: Robot Mode is the strongest, but usage depletes an "energon resistance gauge" that will prevent the character from attacking when fully depleted. Beast Mode recharges the gauge and has high defense, but its attacks are less effective. Vehicle Mode has higher mobility and does not charge or drain the gauge, but has low defense and uses projectile attacks that are easily avoided. The game features a single-player arcade mode, with unique text-based endings for each character.

A versus mode, team battle mode and several mini-games are also available for play. The Japanese version is compatible with the Transfer Pak accessory; connecting different Game Boy games will positively or negatively affect the player character's maximum health and energon resistance gauge consumption rate. The PlayStation version features a top-down viewpoint. Characters move around 3D battlefields, each of which features various interactable objects and environmental hazards that can deal additional damage to the combatants.

Dealing and receiving damage will also build up each character's super meter, allowing them to use powerful super attacks. The game features a single player story mode, in which each faction attempts to move across a map to reach the opposing faction's base, participating in battles along the way. Story mode is split between Maximal and Predacon campaigns, and features FMV cutscenes. The game also includes versus, survival and training modes, while various images and videos can be unlocked in an in-game gallery.

Playable characters This was expanded to 12 each for the North American releases through the addition of four secret characters, all of which are palette-swapped versions of existing characters given unique voice lines. The Nintendo 64 version features an original character, Megatron X, who appears as a secret boss in the arcade mode. In the Japanese release, Megatron X can be unlocked as a playable character by connecting to Kettō Transformers Beast Wars: Beast Senshi Saikyō Ketteisen via the Transfer Pak. In addition to the playable cast, the Maximal Rhinox appears as a non-player character in the PlayStation version's story mode.