Yeah, using the word "addictive" to describe a game probably isn't a good idea these days, especially after the media scourge that has descended upon the industry after the Sandy Hook tragedy.
But let's not take the term in its most literal sense, shall we? Of course, what I mean to ask is- "What's the last game you played that you simply couldn't stop playing?" The question just doesn't work as a headline, you know?
Anyway, while there are plenty of great games out there, I would only label a select few as "addictive." These are the titles that you just keep playing and playing and playing , and time sorta ceases to exist. As fantastic as some productions are, I'm usually aware of how much time I'm dumping into a particular game. Every now and then, however, I come across a game that demands my attention and makes the clock disappear.
I think the most recent is Bioshock Infinite , which continues to entrance me with its unbelievable atmosphere, story, pacing and gameplay. Everything about it just makes me want to keep playing. I think other games that have qualified this generation have been Red Dead Redemption , Grand Theft Auto IV (yeah, sorry, I loved that game), Heavy Rain , Joe Danger , all the Uncharted s, The Elder Scrolls V: Skyrim , Lost Odyssey , Alan Wake , Portal 2 , Hot Shots Golf: Out of Bounds , and all the Assassin's Creed s (with the exception of Revelations ).
So how about you?