There are many different units in
Advance Wars 2: Black Hole Rising. Each unit has different ratings for movement, range, defense, and offense. You may start out with some units in easier missions, but you have to start from scratch and build your units with the harder missions.
The first and most basic types of units are the foot soldiers. Foot soldiers can be either stronger mech or weaker and faster infantry units. Foot soldiers are the weakest types, but they’re the only units that can take over a town, so they are necessary. On top of foot soldiers, there are various types of armored units such as tanks, APCs, and scouting vehicles. Advance Wars 2 also has air and sea units, which can be very devastating if used correctly.
The object of each mission is to either destroy all the other C.O.'s units, or capture their headquarters building. There are a few special terms in some missions, such as time limits (for instance, beat the level in 15 turns), but overall, if you complete one of those things, you will win. In order to capture a building, you have to use infantry, so the way must be cleared with strong units before you can move in.
Overall, Advance Wars 2: Black Hole Rising is a great game for strategy buffs. If you enjoy games such as Command & Conquer and Heroes of Might and Magic, then you will enjoy Advance Wars 2. However, this is not a game for everyone. With some of its missions, it can try your patience to the very end, and it’s definitely not a game you can play through all in one sitting... or even five sittings.