Endless is a really enjoyable mode in the Kingdom Rush series but it is only on mobile.
If you are actually reading this, Ironhide, please add the mode to KR and KRF on steam. I don't have all the heroes on mobile, but steam has all of them, and I would love to test them and play with them on endless.
Since you guys have limited money and time, at least make it a DLC for a buck or two. Maybe have the company you worked with last time for the steam edition of KRF, and have them do it, and take a percentage of it, if you don't want to take the sales risks.
*You lose nothing, no money if you have the other company do it
*You gain money from the sales
*You make your fans get something they want
There is a possibility some fans will be irritated that you didn't add the mode already and might down vote the game. To that I say:
*You are still only gaining money
*I will up vote the DlC, and remind everyone that:
*The game is cheap, considering you get all the heroes, you gain the art, the excellent keyboard commands that make life easier, and especially that amazing mouse hand finger.
*I will make everyone I know up vote my review so it is at the top of the review section.
*I will make everyone that I can get to buy the DLC and up vote it
If you don't want to do that, you can make the KRF steam company make it and add it as an update, and let them have 100% of the steam sales from now on out or something.
So please, add endless.