Processed Tower Defense has an in-game help system that is intended to answer most questions, and which should be consulted as the first line of defense against confusion. Please contact Will Larson or Peter Burns if you have any lingering or unanswered questions.
Whats the point?
PTD is an entrant in the tower defense genre of games, where the purpose is to prevent evil creeps from reaching your home square. Success is attained by preventing failure for as long as possible through valiant combinations of defensive towers.
How do you play?
Make towers. Lots of towers. Build a maze with the towers. Upgrade the towers. Try different types of towers. Use a nuke when desperation raises its bloody head. Never say die. Die. Restart the game and try again.
I keep dying!?!?
Me too. But I'll share my current strategy anyway. I like to build a cannon tower near the creep's entrance and upgrade it as much as possible, while sending wave upon wave of creeps to their demise. Around wave 17 the creeps begin to become too strong for the cannon tower to keep up with. Then I start building missile towers on as many green squares (double damage) as possible, and start creating a tower maze to slow the creeps down as long as possible.
Then I upgrade my missile towers as much as possible before death looms at my doorstep. Then I die.
This doesn't work in my browser!
If you are an Internet Explorer user, then unfortunately PTD simply isn't going to work for you. Internet Explorer doesn't have support for the canvas element which is used to display PTD's gameplay. We recommend Safari for the best gameplay experience.
The gameplay is very slow or laggy!
PTD plays extremely well in Safari, decently in Firefox 3, and not that well im most other browers. It seems to play well in the beta Opera browser as well, but we don't spend too much time in Opera. In the end it boils down to PTD being a fairly complex game running many calculations per second in an interpreted language. The quality of the interpreter is key, and fortunately the next generation of browsers all appear to have signifigant improvements in their JS interpreters, so PTD's performance will continue to improve along with the browsers themselves.