Combat

Combat is a 1977 Atari 2600 game from Atari, Inc., catalogued here for 3 defining game mechanics.

Atari 26001977Complexity 14/1002D TopdownPopular

Combat is a 1977 shooter developed and published by Atari, Inc. as a launch title and pack-in for the Atari 2600. (via Wikipedia)

The genre Combat helped define

Vehicular versus. The VCS launch pack-in that defined two-player head-to-head play on the console.

Vehicle SwitchingTraversalPlayer transitions between fundamentally different movement configurations during play, each with distinct physics.
Contact DamageCombatTouching an enemy or environmental hazard deals damage to the player without any explicit attack trigger from either party.
Projectile SystemCombatPrimary player-versus-enemy interaction is firing and/or dodging discrete moving objects.

Each mechanic links to how to build it in Godot, with the retro games that share it.