Defeat all the invaders to defend your prison!
Collect more weapons and monsters to make them stronger.
Enjoy various contents, such as “underground building, collect various weapons, achievements”
Features :
* Enjoy “retro Graphics & Sounds”.
* Easy to play, anyone can enjoy it easily.
* Please enjoy the pleasure from wiping out the enemies.
* organize a variety of mercenaries and find synergies.
Supported Android Devices : [4.1–4.3.1] Jelly Bean – [4.4–4.4.4] KitKat – [5.0–5.0.2] Lollipop – [6.0 – 6.0.1] Marshmallow – [7.0 – 7.1.1] Nougat – [8.0-8.1] Oreo – [9] Pie
