Crucible TD

The Crucible must be completed! The first of many Crucibles have been built, and now you must defend it! Not long after The Operation began, portals started appearing. Beyond them: waves and waves of different enemies, and their only goal is to conquer what belongs to us! The Crucible must be defended! The Operation cannot stop! You need to show them what we are capable of. Use the elements to your advantage, research over 40 different blueprints and build up your defenses! They must be stopped! The Crucible must grow! We need more resources! Exploit the planet's natural resources, and maintain logistical superiority. The weapons need to be maintained, for if they fail, the Operation will be doomed. The Crucible must not fall! Operation Crucible must succeed. Conquer worlds, build more Crucibles, finish the project!