The Sentinel forces watch over planets and protect them from damage. They are robots that go around, and monitor wildlife. They are alerted by environmental damage, and attack if they see continued abuse of natural resources. They require obedience.

This is a Sentinel Quad. They have a dog-like shape, and attack with kicks and laser beams. They only show up on Wave Alerts of 3 or higher. They have limited sentience.

It can only say, “THREAT DETECTED”, “SEARCHING”, and “SENTINELS DEPLOYED”