Shooter Games

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  Star Defender 4Free
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  StarMadeFree to try

  A voxel-based 3D sandbox space shooter. 

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  TeeworldsFree

  A retro multiplayer shooter.

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  The JuicerFree
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  Urban TerrorFree

  A free multiplayer first person shooter.

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  Wolfenstein: Enemy TerritoryFree

  A free-to-play multiplayer game in which players wage war as Axis or Allies in team-based combat.