
1st Edition AD&D extreme "old school" play with little to no house rules...LFP (have two already, three counting DM.) ...don't worry about access to content, I have more 1st edition source material then a show dog can jump over... ...so... Its possible with smart play and good play for players to advance characters through all the classic modules:
Steading of the Hill Giant Chief
Glacial Rift of the Frost Giant
Hall of the Fire Giant King
Tomb of Horrors
White Plume Mountain
Expedition to the Barrier Peaks
Egg of the Phoenix
Ravenloft
Slave Pits of the Undercity
Secret of the Slavers Stockade
Assault on the Aerie of the Slave Lords
In the Dungeons of the Slave Lords
The Village of Hommlet
Against the Cult of the Reptile God
But more importantly which every modules we play or get through they will all be tied together with an overarching campaign. Based on replies I will provide more details.