Machinegun units look alike. Repair units look like flame units. It can be quite confusing at times. The sound in the game is pretty good though not spectacular. There are a number of interesting Warzone 2100 features worth mentioning.
Units exist from one mission to the next.
There are a wide variety of individual AI settings including guard, return to base when damaged, various aggressiveness settings, and different range to attack settings. Indirect fire is included in the game and is useful when attacking cities or camps with high walls. A combined arms strategy is encouraged and you need to include many unit types in your combat group. Repair units, for example, are a must. They obviously repair units, but the fascinating thing is that they will repair units on their own with no direct orders from the player.