Assault Android Cactus
29 Achievements
1,000
15-20h
I Am Become Death
Complete Boss Rush mode
80
0.93%
How to unlock the I Am Become Death achievement in Assault Android Cactus - Definitive Guide
The bosses:
1) Embryo (Zone 1 Boss)
2) Vespula (Zone 2 Boss)
3) Justice (Zone 3 Boss)
4) Venom (Zone 4 Boss)
5) Medulla (Zone 5 Boss)
Note: You will not be fighting the Android "boss" fight from Zone 5 that came right before the Medulla fight.
Some notes:
-You will pretty much begin each fight at full battery charge
-You do not get to choose a new character between fights
Because you are stuck with a single character, you need to make sure that the selection fits well for each boss. For example, I had a lot of trouble with Justice (Zone 3 boss). My first time beating Justice was with Starch (character unlocked for defeating the Zone 1 boss). At the same time, my first time defeating the Zone 5 Boss was with Coral (4th character you have from the beginning). I eventually used Starch for my win here.
The other thing that helped was the Mega Weapons EX Option (costing 5000 credits). I know a lot of the other achievements recommend the Virtual/AI Players to help, but I found they didn't add as much during the Boss Rush. It appears the health was scaled and only made things worse.
A good idea might be to practice these bosses for getting the S+ ranks as speed will be the key to completing Boss Rush. In general, Justice and Medulla were the 2 hardest to go through for me. The Medulla fight will include the VR enemies part of the fight in the original version.
NOTE: At first, I thought I didn't unlock this when using the EX Option. It unlocked later however luckily. So if there is a delay, don't worry as it should unlock a little later.
Boss Rush is unlocked after defeating the 5th boss. This mode will put you through all the boss fights in one sitting. Since you are not going for S+ ranks, you can afford to play as you wish and also get knocked down. The only really hard part of this mode is the last phase of Medulla, where you have only one minute to get rid of a lot of enemies.
One tip I can give you is to get knocked down on purpose when many boxes start to spawn as you will be invincible when getting up and they will all explode without hurting you. I prefer Cactus for this mode, although Starch is a reasonable choice too. Running out of power will have you restart the whole run from scratch.
If you are having trouble, refer to the following video: