Scarab (level)/walkthrough
From Halopedia, the Halo wiki
This level of the Halo Wars Game is amongest one of the hardest. There is a Super Scarab Tank being constructed and you must destroy it before it destroys you. Luckily the Scarab is immobile but its head is still movable, also luckily you can slow down the heads movements by destroying several power nodes located around the map which can be traced by following pipes coming from the Scarab. There are several ruins located all over the map to hide your units behind when the scarab head looks toward them. Also noted that when you construct a Scarab Tank you do not get most of the features this Scarab has such as being larger a more powerful main armament and different physical appearence. You are allowed control of only one base which has around 20 ruins defending it to protect from the Scarab's gun. The Scarab also has a very thick and large beam of light as to where the head is looking. Warthogs and the MAC Cannon are essential in this mission firing the MAC Cannon when ever you can on the Scarab and Warthogs (being the fastest UNSC ground unit in the game) moving around taking out the power nodes, also upgrading the Warthog to its Guass Cannon Upgrade is very effective into helping groups of 4-5 Warthogs are good. The best tactic is to do all this then attack the scarab with a force built up behind the mountain on the far right side of the map (looking at the Scarab's head) and attack after 3-4 power nodes are down along with all that time firing the MAC Cannon at the Scarab all the time you can.