I enjoyed Heavy Rain more. The game gives you some challenge and you can actually fail and do things wrong. As the developers of the walking dead state in their interviews there are no right or wrong choices in the walking dead game so you can't really fail. No matter what choices you make you still get to the same end of the story as the person who actually tried to make the best choices. The game was intended to be easy so people could finish the game together and discuss it in forums. The story is gripping, particularly because it was episodic like a TV show. If I had played it on one disc I wouldn't of found it as hard to put down as Heavy Rain though. Even though I have all 5 episodes of TWD I can only play one episode at a time even though episodes are only 2-3 hours but with Heavy Rain I can play 5 hours straight without losing interest and I have completed both games multiple times.
Heavy Rain impressed me from start to finish. When I first played it I knew and felt like I was playing a next generation game and not a PS2 game and the graphics still hold up 3 years later. The novelty of the graphics and game mechanics didn't wear off for me and you feel some sense of achievement because you earn your epilogues through your accomplishments.
I wasn't blown away by TWD despite being a hardcore fan of the franchise. It didn't take long to realise how the story would pan out and that the developers were just trying to make a sad game. Some of the deaths in the game were just forced because they wanted to off characters before the end of the story, which the developers admitted in their interview. From a technical stand point TWD brings little new. I felt that the game could have been released on last generation consoles as even games like Silent hill 2 and Indigo prophecy were able to track what you did in those games and in some ways they did it better than TWD. When I played those games on last gen consoles I didn't have problems with my choices carrying over to later levels and the games didn't make mistakes about what I had done earlier in the games when it came to showing the epilogues. If I collected a specific item in Silent Hill2 I would get a specific game ending different from the epilogue I would get if I missed the collectible. In TWD episode 5 can make mistakes and accuse you of doing things in episode 2 that you didn't do which makes for a frustrating experience. This is unacceptable for a game released in the HD and 3D era. The graphics freeze making the game, at times unplayable. The only reason TWD game is praised so highly is because it is based on an already successful,popular, well told story. I would be considered a heretic for saying this but, the truth is if Telltale's Back to the future game or their Jurassic Park game ran as poorly as TWD they would have dropped far more points from their game reviews.
Heavy Rain gets slammed a lot about voice acting,"plot holes" and players not feeling as connected to the characters as they should be but when all is said and done at least our choices matter in the game and we are rewarded for our efforts and time with epilogues that reflect our game decisions and the game actually looks and plays like it should be on a current generation console as opposed to looking like it could have been on a PS2.
TWD has it's good points but as a game I prefer Heavy Rain.