Overall, Heretek is a great addition to an already great game. The new missions, the new class and troops, the weapons and settings on board the ship proper are already a good deal as it is. But this new plotline really ties it all together. It can be compared to XCOM: The Enemy Within, but I think that does it a disservice. Heretek isn't about two factions clashing, it's about one faction splitting and the power struggle that ensues.

I quite liked Heretek due to the way it adds up to the base campaign while simultaneously making use of your characters and giving you new ways to progress. If you’ve been looking for an excuse to get back on the metal shoes of a Tech-priest, look no further – Heretek might be exactly what you’re looking for.

Despite the overpowered nature of the stealth, Heretek does include enough new content to whet the appetite of Mechanicus fans and gives them good reason to come back. The new battlegrounds are a nice reprieve from the planet scenarios of the core campaign, and the new items and units give players more choices. All in all, it brings glory to the Omnisaiah once again.

Warhammer 40K: Mechanicus – Heretek could’ve been a step forward for Bulwark’s stellar first foray into Games Workshop’s license. It had a chance to reinvigorate interest in a tactical RPG set in the Warhammer 40K universe. A newcomer might consider it part of a “more complete experience,” but a returning player might be vastly disappointed. With limited new content, repeating your old romp, and a handful of bugs, it proves to be a disappointment that likes of which will bring shame to the Omnissiah. It lacks the spirit for the machine spirit.