Gamehound, The developers describe the content like this:
The player fights against monsters with guns and melee weapons. No excessive gore or dismemberment, but violence against non-human enemies is displayed.
Some of the game's themes imply self-harm, such as suicide and depression, but are not shown explicitly.
Some of the clips I've seen since it was announced show this to be accurate. If when it releases it turns out to be nothing, I'm happy to move back.