A follow-up to terrifying cult hit Slender: The Eight Pages is in development, creator Mark "AgentParsec" Hadley has announced.

Slender: The Arrival, which is being co-developed by Parsec and Toronto-based indie developer Blue Isle Studios, promises to be "even more terrifying" than the original game, and feature more levels, improved visuals and an engaging storyline. It's due for release on PC "soon".

Unlike the free-to-download original, though, The Arrival will see a commercial release. You can take a look at a couple of spooky screenshots of the game here.

The original Slender saw players wandering through a dark forest at night while collecting pages and being stalked by the freakish 'Slender Man'.

It also scared the cack out of me, as you can see in the video below. I still haven't forgiven them.