The "tutorial scenarios" are special scenarios consisting mostly of a Lua script generating popup messages for some events such as the number of cities or turns. Before version 3.0 only a tutorial for the classic ruleset existed. There will be a new tutorial for civ2civ3, because many critical events (requirements for aqueduct, occurence of barbarians, ideal government, etc.) differ from classic.

Unlike ordinary scenarios the tutorial scenarios (so far)  don't contain a map, and begin in turn 0 instead of turn 1. FIXME: check this, I haven't tested it recently.

Event Scripting
Lua Reference ManualTutorial Scenario
Update from 2.5 to 2.62.6 to 3.0