BullfighterG 10

Bullfighter G10:
Kill a Rammstein without using any powers.

Very late in the game, at the ID level (as well as Infin-ID) there will be a monster that charges at you differently than the Kamikazes. It kind of looks like a jellyfish with a spiked helmet charging at you. The eyeballs are underneath the helmet and are vulnerable when he charges at you. To get the achievement dodge his charge and start absorbing his eyeballs. As long as you don't kill him with a bomb, shield or berserker power, it should unlock.

The hardest part about this one, other than getting all the way to him without ripping your hair out, is that for me he was constantly spawning with several other enemies around him. You might want to try and take them out first as they can kill you in mere seconds which will force you to find another Rammstein again.

One method you could try is to have an upgraded shield and use that as you take out the other monsters. This is risky though because you don't want to accidentally hit into the Rammstein with your shield going or it'll negate the achievement.

Took me two tries to get this one after figuring out which monster to look for so it shouldn't be too much trouble after learning the attack pattern. Also, as an added note, the Revive Token Bomb has been confirmed to NOT work for this achievement, so don't waste one if you don't want to (Thanks to RazorPriest for that info).

Noted by NutriWhip:
"I noticed a pattern in that the Rammstein wouldn't appear until after I had gotten to at least 3-4 shops/checkpoints in Infin-ID. So I ended up speed running each section and using the shield powerup when I knew the upcoming section was going to give me some trouble."

Noted by RadicalSniper99:
"Getting hit by the Rammstein does not result in it dying like the other kamikaze units. As a result, having extra hearts when confronting them can make a big difference between success and failure."

Noted by WhatsATopher:
"If the Rammstein does manage to kill you, as long as it is outside the Revive Bomb radius you can revive and carry on killing it and still get the achievement."

The hardest part about this achievement is FINDING a Rammstein, and there's no trick to it. Just keep progressing through levels, and sooner or later, one will show up. Rammsteins look like jellyfish, and their tentacles contain the eyes you must snatch from them. They have no projectiles, they don't track you once they start their charge, and they aren't extremely fast, so they're easy to avoid. In order to kill one, you must side-step them when they charge you (hence the achievement title), and snatch one of their eyes from their underside. Rammsteins are quite easy enemies as long as you encounter one by itself. When encountering one in a group of enemies, it would be easy to get overwhelmed, and the problem is that the bomb that detonates when you revive counts as a power use. So if your revive explosion kills the Rammstein, you're out of luck, and the hunt continues.