Full version game
OS: Windows XP/Vista/7/8
CPU: 600 Mhz
RAM: 512 MB
Royal Defense - Invisible Threat is well-known Tower Defense game
40 different progressively challenging levels
17 kinds of creatures
12 kinds of towers and structures
All our PC games were licensed for distribution as freeware by other game publishers or developed by internal game studio.
No pirated software, 100% legal games.