【Gabe Newell's FAQ - Valve Developer Community】
Valve Developer Community のGabe Newell's FAQ より

When will Half-Life 2: Lost Coast ship?
At the end of October.

もう少し忍耐忍耐

あとAftermathのプレイタイムは5時間ぐらいらしい

How long is Aftermath Episode 1?
We're aiming for around five hours. The last time I played through it took me six hours, so your mileage may vary.

Episode 1 てのが気になりますね。