Sin's recent post on Portal made a remember about another game in the works that was just announced which I think will be very exicting as well.
The Crossing is made by the same guys behind Dark Messiah and will use the source engine. Same engine Half-Life, Portal, and many other Valve games use. Enjoy
First hints at the game.
First details about the game works.
I can't wait to kill you while trying to complete an objective.
