It's August 2015, and to follow on with the success of last year's #RPGaDay event, David Chapman at Autocratik has created a new list. Each day in August, I'll be posting my "answer" to that day's topic.
It's my opinion that it's impossible to play a long-term horror campaign without it becoming either comedic or action, or some combination of both. If I'm choosing a favorite action horror RPG, I'd have to go with the Rippers setting for Savage Worlds. I love the Victorian era for horror, and Gothic horror, in general. Couple that with Rippers' use of its own take on the classic "Universal" monsters, along with the penchant for tweaking the historical, and honestly it's the most fun I've ever had with horror.
That said, if I'm looking for creepy, psychological horror, played over a shorter period of time—a few sessions at most—then I have to go with tremulus. This Apocalypse World-based game is definitely creepy. I also like that it's quick to generate characters and get playing. When players have to invest a lot of time in creating a character, I find they're less likely to fully embrace the genre and over-protect their characters. With a game like tremulus, that's all on the table. Players know they can't expect to hold on to their character for a long period, and they tend to have an easier time buying in.