Category Archives: Thursday in the Zone

Gaming-related posts, covering games of my particular interest from the collectible, video, and PC genres.

Onslaught 2 (Tower Defense)

With several different maps, multiple difficulty levels, and dozens of towers to choose from, Onslaught 2 is one of the most detailed and customizable tower defense games I’ve ever played. Read on, and see why I enjoy it so much!

Basic Gameplay

In Onslaught 2, you are trying to guard the military base (marked “Area 51”) from being invaded by waves of enemies. To that end, you have to build towers of varying types to defend the winding route to the base. If 10 enemies get past you and invade the base, game over. With every enemy you shoot down, you get a certain amount of money, which increases by 1 dollar with each wave of enemies.

This money is for upgrading your towers’ damage, rate of attack, and range–but you have to upgrade strategically! For instance, if you upgrade the tower’s range all the way and forget about its damage, soon you’re going to be pinging away at enemies that barely even feel the bullets, even if you can shoot them from way far away. Thinking and planning ahead is key (see next section for my strategies).

As you progress in the game, shooting down enemies and getting money, you also get access to different types of towers you can build. For instance, you can build a taser tower (temporarily paralyzes enemies), a sniper tower (epic, one-shot damage) and even a railgun tower (zaps the enemy it’s aimed at, as well as all the enemies in a straight line behind that enemy). As the enemies get stronger, you’ll need those better towers to aid you!

My Strategies

I find that upgrading a tower’s damage is of the utmost importance, followed very closely by upgrading its rate of attack. A tower that can shoot for massive damage multiple times in a few seconds is likely not going to need a long range to defeat its enemies. But some players have done well balancing upgrades to damage and rate of attack with upgrades to range; it’s all in what your particular playstyle is.

Though I liked to use the pellet gun tower (blue) when I started playing, I have found that it’s not so helpful after the 100th wave. Likewise, the laser tower (green) isn’t really of much use late-game unless you get a whole chain of them together so they can help each other out. Thankfully, you can sell off older, fully-upgraded towers later on if you need the money to upgrade stronger towers.

As in most games, there are very powerful combos; you can put two or three towers side by side to create much more damage output. I like to use the Rocket (red tower) and the Taser (yellow tower) together–once both their damage output is fully upgraded, they unleash homing rockets that are pretty much one-hit kills for at least 5 enemies. Great for clearing out a clump of baddies!

You can find more strategies and combos by visiting About Combos on the Onslaught website, or by visiting the Onslaught 2 page at One thing’s for sure, there are many ways to succeed in Onslaught–there’s always new things to try!

Play the game: Onslaught 2