New arrivals on Xbox LIVE Marketplace today show up in the form of a new tower defence game called Defense Grid, and a piratey, ship combat game called Yo Ho Kablammo, both available today for 800 MS Points apiece.

What adventures can we expect from these games? Head on down below to read more about both Defense Grid and Yo Ho Kablammo, as well as watch some trailers from both games:

Defense Grid:

“Defense Grid: The Awakening’s features include edge-of-your-seat gameplay, where players need to defeat hordes of invading enemies by strategically building fortification towers around their base. Each base has a number of valuable power cores that players must defend at all costs. Enemies invade your bases in waves, intent on stealing all your cores and escaping.

“The player can stop them only by strategically selecting and placing defensive towers as resources allow. This action all takes place in beautiful environments, complete with spectacular effects and a dynamic, engaging soundtrack. The controls are intuitive and the gameplay is deep - the special attacks and properties of each tower work together to provide many ways to succeed.”

Yo Ho Kablammo

“Immerse yourself in the fully 3D pirate world of Yo-Ho Kablammo. Master your vessel and take to the seas in this frantic action-packed game!”