Way too many WIPs for me to even count.
Off the top of my head, there’s Heal by @bawpie, apparently worked on and off (and bumped), as the 2012 thread went through a 2 year hiatus and was resurrected in 2015. (Link still works if you look up the game)
Hmm… RATiO by @FoxalypticWorld. I’m a sucker for these sorts of otherwordly/monster focused games, and this one’s no different. Kinda iffy to call it dead though as the last post in the thread was in late March, but it counts. (Link still works)
Children of Iseir by @Rob. I loved this game’s intro and its level of character creation, it made me giddy just by playing as a child. The fact I still remember it is a testament to it’s memorability. (Link DOESN’T work)
Aeon Sage by @RETowers (aka Reaperoa). This WIP had an otherwordly, yet immersive (dare I say down to earth, until the inevitable plot buildup) atmosphere to it. The game was fascinating for this reason, and I found myself enjoying it as well. (Link has been removed)
That’s all I can think of off the top of my head. If I think up anything else I’ll make sure to update. I would post the links but it’s easier to do on a computer. (Did this on a phone)
EDIT: Ah, I thought up of a couple more.
Ruler of the Red Empire by @Bastiaan. Really old, first posted in late 2011. You play as a royal family member (or heir, if you will) of an empire, and from what I vaguely remember your choices affect whether your empire values innovation, isolationism, pacifism, militarism, among other things. Quite enjoyable despite the rather rough state of its draft. (Link DOESN’T work)
@Ayzkalyn and Dragonslayer. This one is definitely more of an RPG then many other WIPs, with an emphasis placed on increasing your stats and money. Very well polished, though the author stopped development a little while ago. (Despite the last time I played it there was content there that I didn’t remember being there before, sooo…) Link for this one works.
The Order of the Rose by @TheWoodSprite. Another genre that I’m a sucker for, the game is set in a fantastical world where the MC can be a human enslaved by a race of their own creation, said race, and more. The storylines for each started uniquely, each having their own settings to kick things off. Development was put on hiatus as the author started working on a prequel, and hasn’t been seen since April. The link still works, though.