* Story line and endless survival modes.
* Earn credits to unlock permanent technology upgrades as times goes on.
* 8 different core tower types. 3 utility, 5 combat.
* The 5 combat towers have secondary firing modes for additional strategies.
* 20 stage story line, with 4 different visual evolutions as the story progresses.
* Beautiful music and sound effects.
Q. I can't research anything even though I have credits?
A. The research flow is from the bottom up, and you can only research the upper nodes if you've successfully researched the lower nodes connecting to it first.
Q. What is the "shield" button on the tower upgrade menu in the game?
A. If researched, combat towers have the ability to toggle between primary and secondary firing modes.
Tags: eros, er osi a rcsade.
* Removed the tower toggle button and associated research. It was too complex for too little return.
* Small interface changes.
* Rebalanced level 1-1 - Apologies for making it so hard :)