Sure, skills and tactics played their part.

But this was a victory built on resilience and self-belief.

The match was broadcast on Foxtel, and commentator Joel Caine was at times struggling to describe what he was witnessing.

"I can't believe we're seeing this scoreline," Caine said at full-time.

Wests led 14-nil after 25 minutes, but it could have been double that.

A string of Wyong errors and a penalty count that favoured Wests Tigers 5-1 at the 30-minute mark saw the home team camped in Roo country.

Led by accomplished halfback Josh Drinkwater, Wests Tigers launched raid after raid into the Wyong 20-metre zone.

"Unless Wyong have been running 10km every day, you'd think Wests Tigers have to score in this set," Caine said, anticipating a weakening in Wyong's resistance.

But the Roos held on to the break.

Whatever Wyong coach Rip Taylor said at half-time, it worked.

And whatever pre-season fitness torture the Roos endured, it worked.

Hooker and captain Mitch Williams started the second-half fightback when his dummy-half run and inside pass sent interchange forward Abraham Papalii crashing over to score.

Williams was at it again minutes later, skipping out of dummy-half and firing a bullet pass right on the money to Jack Siejka to score.

The captain's lethal passing close to the tryline prompted Caine to liken the dummy-half work to that of Australian skipper Cameron Smith.

When winger Omar Slaimankhel swooped on the crumbs from a cross-field bomb, suddenly Wyong had levelled the scores.

Penalties and possession had begun to flow back Wyong's way. And this time the momentum could not be stopped.

Tries to five-eighth Samisoni Langi and another barnstorming effort from Papalii completed the second-half rout.

"What a comeback from the Wyong Roos!" Caine said. "I have not seen a game in my time as a player and commentator where there has been such a one-sided swing of possession."

The win moves Wyong to fifth on the NSW Cup ladder. They have the bye this weekend.