Wesnoth 1.9 ships with 16 campaigns which total over 200 scenarios, each one with varying amounts of events, dialogue, cutscenes, special gameplay mechanics, and so on. It's inevitable that many scenarios contain bugs which have gone unnoticed or unreported. Also, most scenarios were originally written a long time ago when the game engine was much less versatile, meaning that some scenario mechanics don't function as naturally and conveniently as they could.
This task involves picking a mainline campaign on a specific difficulty level, playing through it and reporting in as much detail as possible all bugs and glitches encountered as well as suggestions for improvement. Campaigns with scenario branching should get all their branches tested. For more details, see http://wiki.wesnoth.org/GCI/PlaytestingYou should playtest the following: Playtest An Orcish Incursion campaign on Normal (***) difficulty
You should playtest the following: Playtest An Orcish Incursion campaign on Normal (***) difficulty