Concrete Ocean is the fifth level in Neo-Necropolis. This stage is a remake of Blue Ocean.
Battleground
- 2 Kang Roos right after the battle begins, delay 12 seconds.
- After 24 seconds, Otta-smack-us start spawning, delay 32~53.3 seconds960~1600f.
- On base hit, Otta-smack-u spawns as the boss with:
- 5 Capies, delay 17.3~26 seconds520~780f.
- 3 Shadow Boxer Ks, delay 26~34.7 seconds780~1040f.
- 3 pairs of Dark Otters, delay 26~34.7 seconds780~1040f per pair.
- 3 triplets of Otta-smack-us, delay 26~34.7 seconds780~1040f per triplet.