Great Little War Game is a turn-based wargame with a cartoony art direction, similar to the Famicom Wars and Battle Isle series. The game takes place on a strategic map divided into tiles. The player can move his units and attack the enemy if within range. Terrain has an effect on movement and efficiency, for instance a Sniper will be more deadly if shooting from a higher position. The player also controls buildings: there are resource sites that produce credits at the beginning of each turn, factories that can produce new units, and the headquarters. If the headquarters are captured by the enemy, the game is over. Only engineers can capture buildings, but carry no weapon, so it's up to the player to find a way to escort them into enemy territory while fending off the attacks against his own base.