Earth Defense Force: Insect Armageddon
51 Achievements
11-13h
Hector Wrecker
Kill 100 Small Hectors Hector Who?
12.1%
How to unlock the Hector Wrecker achievement in Earth Defense Force: Insect Armageddon - Definitive Guide
The first stage has a small Hector at the end, and can also take out huge chunks towards the helicopter kill achievement and 1000/10000 ants achievements. Just playing through the game on all difficulties should net you almost all the Hector kills you need however. Then if you still require any, chug through the first stage a few times in order to wrap up the final kills you need for the achievement(s).
If you want to just do Hectors, stage 1 - 4 (I believe this is the right stage, the one you start off with mechs) has a bunch of Hectors and other enemies to fight.
Hectors are smaller and more common version of the Hector units with the larger ones being experienced later in the game. The first time you'll encounter one of these is in Chapter 1-1 and it shouldn't pose too much of a challenge. They will fire rapid-fire pulse rounds at you and plasma balls as well as try to run you over, but the fights against these shouldn't be too difficult. Their weak point is at their chest where it is glowing red.
Any of the maps in survival mode offer a great way to rack up kills. See Good Start for details on where certain enemies are located and in what map/wave.
You'll get nearly 20 Small Hectors in a single Campaign playthrough, but there are three near the beginning of Chapter 1, Mission 4 or five in Chapter 3, Mission 2 that you can farm if you'd like. You'll get a ton of these on Map 1 (Cornerstone) in Survival as well.