I’ve had this PC game for probably almost 20 years. I remember buying it at a Hamfest in Akron. I noticed that in the scrapbook, the package for original Leisure Suit Larry has a Coco 3 sticker on it, go figure.
I discovered if you press clear after Temple of Rom starts it switches to PMODE 3. I wrote a short basic program that switches the palettes to make it look more like the tv artifact graphics colors. Download the disk image here.
A quick video of the workaround in action
A quick videos of the alternate color modes you can get with the clear, shift and enter keys before the “patch”.
Remember that 512k Coco 3 I brought back from the dead with a 6309? It had a broken off power switch. I ordered the part from mouser it arrived today and I installed it and all is well I no longer have to take the case off to work the power switch.