Herzog[a] (pronounced [ˈhɛʁtsoːk] ⓘ; German for 'Duke') is a strategy video game released by Technosoft in Japan for the MSX and NEC PC-88 computers in 1988.

Ten years prior to the game's events, President Hughes, head of the Republic of Mercies, is assassinated.

The Ruth Liberian Army, a terrorist organisation led by Roger Tense, takes responsibility for the act.

A decade later, Ruth's army is at the gates of Vaxan, capital of Mercies, and the war begins to draw to a close.

If the player is successful and captures Remerje, capital of Ruth, the war ends and the two countries sign a peace treaty five years later.

At the bottom of the screen, each side has gauges the show the percentage of damage taken by their respective Land-Armors and Bases.

Only one Land-Armor at a time can be active on the battleground and is directly controlled by the player (the other units move independently).

The computer controlled army has an infinite number of Land-Armors, but the player does not and must buy extras if needed.

Instead, they are armed with a finite number of homing missiles that can seek and attack the enemy Land-Armor on the ground and in the air.

Although they are expensive and unable to move without assistance, they are very durable and have a high rate of fire, making them ideal to take out tanks as the name suggests, or to defend bases.

It travels across the battleground very slowly, and if it successfully reaches the opposing base, it automatically destroys it with 100 percent damage.

It was the first with a feature set that falls under the contemporary definition of the genre, predating the genre-popularizing Dune II (1992).