Tower Defence with RTS core
https://www.youtube.com/watch?v=KtkhhAbPMbUProtocol Defense combines Tower Defence with elements of classic RTS in Sci-fi setting.
Building and upgrading towers won’t be enough to complete a level in Protocol Defense, players really need to use their tactical and strategic thinking. If you intend to win you should control the battlefield using different defense tactics. Use mining structures to boost your economy and build strong defense. Tactical pause will help you to plan your next moves.
Are you going to rush with towers or put on upgrades? You can control the field with limited number of towers relocating and replacing them at any time. Wide variety of tactical possibilities awaits you.
http://protocoldefense.com/en.html