Operation Combat II: By Land, Sea and Air is an isometric timed turn-based wargame strategy, similar to Perfect General or Modem Wars. The player chooses one of six available battle terrains and face off against an opponent with only one objective - annihilate the enemy's headquarters. The player can play against computer or human player (modem and null modem connection). The game features a time limit per turn, giving only 240 seconds per turn. The game offers isometric 256-color VGA graphics, hybrid menu and point and click interface, variety of land, sea, and air support units, and basic sound effects.