This is a simple but fun tower defense game. Gameplay is similar to the previous game in the series, iBomber Defense, but several improvements have been made.
The biggest criticism with the previous game is that gameplay became stale after 40 or so waves in a single level, and some levels were too similar to others. But in iBomber Defense Pacific there are usually only 20 or so waves per level, and each level is quite different making for better variety in gameplay.
Also, there are now secondary objectives, like having to defend an oil refinery, or having to destroy enemy bunkers. Completing secondary objectives is optional but doing so earns you points to buy upgrades.
To keep things fresh now you sometimes have to deal with enemy units that aren't rushing your base! Yes, sometimes enemy units will come out onto the battlefield and start shooting it out with your turrets. This becomes especially tricky if you're trying to defend a secondary objective: Should you put your limited resources into defending your base or defending the secondary objective?
Another improvement is that now you can drop bombs on the battlefield. Bombs are a limited use item that are gradually replenished over time. Since you'll only get a few you need to make sure each one counts. Should you use them to thin out the ranks of the baddies rushing your base? Use them to blow open supply crates to get extra resources? Use them to kill that enemy battleship that's parked outside the range of your turrets? Use them to destroy a target to complete a secondary objective? Use them to destroy the secret enemy base hidden in most levels to get bonus upgrade points? Or just start randomly dropping them on buildings to revel in sheer destruction? There are a ton of tactical choices to make!
If you like tower defense games you owe it to yourself to check out iBomber Defense Pacific!