Last time we got a look at co-op in Portal 2 (when we weren’t playing it in-person, anyway), we met the two robots we would be taking through this part of the game, which is twice as long as the original Portal.

This time, we get an even longer look at co-op mode, and a reminder that even though the Enrichment Center might look a little different, it’s still the same old GLaDOS doing the testing.

“Now it’s time for your real purpose,” whatever that happens to be. Knowing her, it’s nothing good.

Watch the latest trailer, full of the usual awesomeness, below.