Fighting Alone Achievement guide for Kaiju No. 8 The Game. See how to get Fighting Alone, conditions, how to complete, rewards, and unlock a Message in K8 The Game.
Unknown Possibilities Achievement List | ||
With My Own Strength | Fighting Alone | This Is Who I Am Right Now |
Nobody Gets to Quit | Family Restaurant Discussion | Same Aspirations |
I'm Saving You | The Clean-Cut and the Wild Child | Slice Open a Path |
Table of Contents
Fighting Alone Conditions
Clear Training with Only Kafka Hibino

The "Fighting Alone" achievement is unlocked by clearing any Training stage with only Kafka Hibino. Since the stage is not specified, choose the lowest-level Training stage for an easier clear.
Cannot Be Obtained with Kaiju No. 8
The "Fighting Alone" achievement cannot be unlocked using only the 5-Star "Kaiju No. 8". You must enter Training with Kafka Hibino as your only character.
How to Complete Fighting Alone
Prioritize Leveling Up Kafka
Things to Prepare | |
1. | Enhance Kafka Hibino's level - Enhance to Lv. 20 *Enhancing to Lv. 40 also meets the conditions for the "Family Restaurant Discussion" achievement. |
2. | Raise skill levels -> Enhance Passive Skill / Combat Skill / Ultimate |
3. | Raise weapon level -> If Weapon Ascension is possible, perform it How to Perform Weapon Ascension |
Since Kafka needs to stay alive to unlock the achievement, leveling him up should be your top priority. Skill and weapon enhancements are also useful if you have enough materials.
Level Up 4-Star Kafka Hibino

To complete this achievement, we recommend leveling up [The Man Who Became a Kaiju] Kafka Hibino. When he uses his Ultimate, he transforms into Kaiju No. 8 and can unleash an AoE Attack, letting him hit multiple enemies at once.
Tip! | This character can also be ascended to A6 with rewards from the "Beginner's Guide". Beginner's Guide |
Training: Basic Material Difficulty 1 Recommended

Once Kafka is reinforced, clear a Training stage. "Basic Material Difficulty 1" is recommended since the enemies are only Lv. 1, making it easy to clear.
Recommended Strategy in Training
1. | Use the Ultimate in Wave 1 or 2 to transform into Kaiju No. 8. |
2. | After transforming, focus on using the AoE Combat Skill to deal damage. |
After transforming, if Kafka's Ultimate becomes available again, it's fine to use it right away.
Fighting Alone Achievement Overview

Achievement Name | Fighting Alone |
How to Get | Clear Training with only 1 Kafka Hibino (*You only need to clear the Training once) |
Reward | ![]() |
Receive a Message on Completion

After obtaining this achievement, you will receive a message from Eiji Hasegawa. If you view this message to the end, you will receive Dimensional Crystal x20.
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