freeworldgroup.com

Take control of a lone sentry in his tower and defend it from waves of mythical creatures, large and small. Level up and place your talent points strategically in 3 separate talent trees with 48 talents to choose from. Upgrade your bow, arrows, tower and torch to further maximize your damage output.

Journey through 8 beautiful, hand-drawn worlds; from the dense forests of Wildwood, to the fiery peaks of Molten Summit. Battle 4 unique bosses, each with their own array of abilities and attacks. Shoot, blast, explode, freeze, burn, and demolish your foes with 16 unique spells.

In short: Tons of enemies, tons of spells, tons of unique build options, tons of fun!

http://www.freeworldgroup.com/g/i/sentry-knight.htm