That’s the essence of Stupid Zombies 3 – going for those eye-catching combos. You get to earn bonus points for each extra zombie of the same color you put away with your shots. So if you kill two zombies of the same color, you get three points. Killing three of the same color, on the other hand, will earn you six points, while killing four is good for ten points. That’s pretty much all there is to it, so always go for the combo if the opportunity presents itself; going for simple one-zombie kills won’t be enough to help you beat the harder levels.
You can consider this part of the game’s trick shooting element – Smash Kills are what happens when zombies get killed by objects in the game, such as crates, platforms, vents, wheels, and the like. That gets you an extra point each time your shot results in a zombie getting crushed by something. Use those physics objects to your advantage, and to score more points.
We wouldn’t call it “stupid” physics, but some of the physics mechanics in Stupid Zombies 3 is a bit strange. Using grenades, for instance, can be very frustrating for the average new player, but with a little practice, you’ll get used to how they move and how they bounce. What you’ll want to do is throw them in such a way that they kill multiple zombies, instead of ending up in an empty pit – see if you can have your grenade bounce to multiple parts of your display. It also helps to have your grenades stuck somewhere so they’re close to their target, among other easy ways to use grenades.
Aside from grenades, there are other shots that need to be as steady as possible. If that becomes the case, then you can make use of Aim Lock by holding a second finger on your display. This keeps the shot steady, and if you release the aiming finger at the right time, you can fire away and hit the zombie(s) right where you want to.
If you see a huge pack of zombies coming your way, then shoot the exploding barrel closest to them and watch them fry. As explosions go past walls and barriers, shooting an exploding barrel is the only way you can kill zombies if they’re protected by brick bunkers.