Pros: - Plenty of supply and weapon spawn - Ideal campaign length - Challenging crescendo events - Connects the gap between The Sacrifice comic and the actual The Sacrifice campaign. (Though not necessary. But brilliant fan theory that the Survivors board another train to Rayford.) - Actual NPCs that can be interact with, compared to vanilla campaigns' voice only NPCs Cons: - Huge research facility. But it reminds me of Black Mesa though :) - Lag spike on waterfalls and sewers - Misleading finale mechanics. - Hard to get in the escape train. Survivors tend to get knocked back when jumping to the train door or get stuck when entering the catwalk from behind the train. Recommendations - In the finale, point the arrow to the canister instead of the peronnel. Or canisters shall have glowing outlines (except in Realism) that can be seen from afar, just like the gas cans of Dead Center's finale. - Make the catwalk of the escape train more wider. Point the train door instead of highliting the entire train car. Tips for players: - Sewage water look deep, but they are not. Though the part before the first safe room is deep enough but survivors must walk to the shallow part to sa saferoom quickly. - There's a huge drop off in the solid waste facility. Make sure you have enough health before getting down there. - Watch out for chargers when walking though a tight hallway. - Never use those severed limbs as melee weapons during crescendo events. They lack range and crowd killing power. Machetes are highly recommended for their easy kills, crowd killing, and fast attack speed even they have small swing arc.