War Heroes is an interesting strategy game for free.

Publisher:	Gamekens Games
Downloads:	1
Software Type:	Freeware, 0.00
File Size:	1.50M
OS:	Windows All
Update Date:	06 July, 2015

Don't let enemies destroy your main base. Buy towers, upgrade them and kill the other soldiers before they reach the main base. You'll have to win the war if you don't want to lose your country. Good luck.