There are tons of SHMUPS on iOS and Android so the obvious question you're asking is what makes Plunder Kings unique? We're here to tell you:
Endless Waves: Plunder Kings is an endless game with the focus being on upgrading and unlocking new things while solving challenges to get the highest score possible.
Kill to Power Up: Use an in-game dynamic upgrade system, the better you are at killing the better your weapons become.
Stage Challenges: Challenges will come up during play. Complete them to get higher scores and unlock new stages. Think they're all killing based? Oh no, it gets weird.
Boost Mode: Double tap to increase attack power.
Boss Rush: Battle massive bosses that evolve and change as you increase in stages.