Dawn of the Tiberium Age (DTA) is a stand-alone mod that combines Tiberian Dawn (C&C 95) and Red Alert. While classic mode gets as close to the original game-play and balance as possible, Enhanced mode provides improved game balance and a lot of fun new stuff. DTA features many customization options for Skirmish and multiplayer (where you can play as GDI, Nod, Allies and Soviet on over 200 maps), challenging original singleplayer missions, as well as co-op missions. Since this is a stand-alone mod, you don't require anything but the mod itself to be able to play: the original game is not required.
Poor ChronoSeth (metalic) got surprised and the Red AI effectively blocked his base entrance with a group of Termites (A new Enhanced mode Nod unit, a subterranean deployable laser turret). While Bittah (Gold) is trying to help him, those few medium tanks simply weren't enough.
Are those... mobile Obelisks of light?
They're called Termites. They're more like mobile subterranean laser turrets. In other wrods, they can travel underground and once they come up from under the ground they can deploy into a laser turret.