Krell is a Space Invader with a twist. You don't have any barriers for protection against the enemy formations, instead you have a barrier above them. This barrier protects seven space aliens from a lone yellow invader who patrols the upper portion of the screen. Shoot down the invader formation without hitting the barrier, or you might end up hitting the trapped aliens. When all the white aliens are dead, it's game over time, and that is also the case when you are killed.
[source:mobygames]
Distribution : Retail - CommercialPlatform(s) : Commodore Vic 20
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