Playing The Witcher, DMC4 and System Shock.
On the subject of HL2, I found it bland, unengaging, and way too linear. The engine was great, though. It ran very well, and looked quite stunning at the same time. I played a bit of CoD4 the other day, and as far as linear shooters go it seemed much, much better than HL2 even if the gameplay suffered from repetitiveness.