Portal 1 is basically a lengthy tutorial for Portal 2 that manages to still have great moments, gripping world building and a kick ass ending.

Portal 2 is one of the greatest games of all time, and aside from maybe Tetris Effect the best puzzle game of all time. Writing is top notch, gameplay is non stop genius ideas, and it plays super well.

Combine them to make a flawless package. Portal 1s shortcomings are all no big deal when combined with the sequel.