D.E.I.M.O.S. is really polished on the outside, and it's fully voice acted. But in terms of fun and playability.....meh at best. It's missing quest markers at the beginning, so I spent a lot of time wandering around trying to figure out the right puzzle to complete (after repairing the transformer on my own because I stumbled upon it) until I realized that you only get the marker to continue with the game when you try to open a particular locked door and it gives you the message to turn on the generators. And the actual gameplay really could have been better, since (at least at the point I'm in on the mod) the enemies are all low level and die in droves.
And the bugs. My God, the bugs are perfect for a Bethesda game. There's the two NPCs not being isolated from enemies, causing them to run all over the area when you try to talk to them and occasionally causing the whole thing to lock up because the game locks you into place for a "cutscene" and the guy who needs to initiate dialogue with you to continue is unconscious, on the other side of the building, and surrounded by feral dogs because he started running away in the middle of it beginning. Even when I got the scene to work well enough for me to continue, Dr. Matthews was running farther and farther from the conversation to avoid radscorpions and eventually was totally indistinct when talking. He also once stole my Red Glare from its locker to attack the enemies and kept knocking himself unconscious with point blank rocket blasts. AND the quest began with the cowboy dude in the first room simply drawing his weapon, making strange faces, and slowly walking away toward the ladder before stopping. I had to mash the E key on him until he put his gun away and opened dialogue.
And, of course, the robot with broken pathfinding that makes a mandatory escort quest impossible. Even worse, it was the SECOND time it happened: I got annoyed and shot the first one with my 10mm, then when I got a second robot it marched right up to the decapitated corpse of the first and stood over it.
The presentation is really good. But the content is lacking (and if it gets better later, it's taking WAY too long to get interesting) and the execution is broken.