” A.W.O.L. is a tactical mil-spec FPS game, being developed using the BUILD Engine, the very same engine behind such classics as Duke Nukem 3D, Blood and Shadow Warrior. The is set to release near the end of this year, and it will be completely free, which is a giant plus to put it on your wish list.
Source: N4G PC A.W.O.L. – A new BUILD experience