After searching about 30 pages of this thread for answers I found nothing and became jealous of all these people finding their games! So, I decided to post my memories.
All of the games I'm looking for were on PC. When I was 5-10 (1998 - 2003) My dad used to always get those collection discs with about 10-100 demos on them, and I'd play them all and loved them. I remember some of the names of them (the games but not the discs), but there's two that I can't find online.
1. It was a game you viewed from first person, and I remember it having good graphics, and it was mysterious. I'm pretty certain it was a point and click adventure viewed from first person. It had 3D graphics (definitely not cartoon), although the graphics only APPEARED 3D, it was probably just images, because I'm pretty sure it faded between images instead of you moving. I'm pretty sure it was modern, but it had a sort of fantasy feel to it. The ONLY gameplay I remember of it is sort of exploring down this path through what I remember as a forest, and going down this tunnel in a tree or hole or something, looking for clues. I've checked so many point and click adventures online and I can't find it (although I'm worried I won't even know it if I see it). It could have been Myst, but I don't remember any of the graphics by looking at videos of that game. Schizm doesn't look like it either, those two are similar to what I remember though.
2. Another first person point and click adventure, about a dog escaping his owner's room. I remember his owner leaving for the day and he leaves you at home (although that could be wrong), and you have to find a way to escape. I remember the name being "Dog's day out" because I remember thinking the name sounded much alike "Baby's day out". But after searching the title "Dog's day out" I've found nothing.
3. (Extra) I wonder if anyone knows the name of the demo discs I played if I give titles of demos on them, I had about 4 or 5 discs in total with about 20 demos on each
so many games I don't know the names of. Warcraft II, Torruk II (I'm not entirely sure), DOOM, Diablo (All though I remember Diablo having cars in it.. lol), Lemmings Paintball (I'm not sure if this came from a demo disc but I played the game at the same time brackets), Jedi Knight, Jump 'n' Bump, Wheels, The Neverhood, Rayman.. Damn that's all I got.. I don't think all of the games were demos though, I just remember calling them demos.
Sorry for the massive post, and thank you for any help. I'll try to help out others.
Edit: I also very vaguely remember this other game, it was like a really weird game about a picnic, but you sortof blow up the picnic blanket with the food, and it turns into weird shapes.. It was very weird haha