Sons of Liberty was the mission before Snake retired just after Zanzibar. Hense Prequal, and it was aweful...
More of an interactive film with game in-between it, why the hell didn't Kojima make it a Machinima i'll never know.
Twin Snakes was a far better use of the engine. Particularly playing on Normal/Hard modes.
The levels for MGS2 were hardly creative either, which peeved me off. All that power of the PS2, and all they did was enhance the graphics and gameplay... with less guards around it also made it boringly easy even on the hardest mode.