I'd posted a version of this for SDXL a long time ago. Here is a version for Stable Diffusion 1.5 since a bunch of people have asked:

1990s PC adventure games by Lucasarts (Ie: "Monkey Island", "Indiana Jones and the Fate of Atlantis", "The Dig"). Trained on over 80 screenshots from various early 90s point and click adventure games by Lucasarts (w/o the menus).

Trigger with "lcas artstyle" - (as in "LucasArts artstyle")

Dreambooth was used to train the base SDXL 1.0 model. The LoRA was extracted from the trained model via Kohya script.