Really hard to narrow it down, but I think this would be it:

1. Elden Ring. Before the DLC this would’ve been a toss up for where on the list to put it, but SotE made me confidently place it as my favourite game of all time. I’ll avoid any other Souls games in this list for the sake of diversity but Dark Souls 1 & 3 and Sekiro were all in contention for first place before the DLC. They’d make up spots 2-4 on my list, but I’ll omit them for this one. Elden Ring renewed my love of video games, at a time where I was getting a bit burnt out from playing them. When the DLC came out I played it day one, which I never do for anything, and it completely blew me away, even more so than the base game. The world design of SotE is incredible, the views are breathtaking, and the bosses are the best in the whole series. I cannot fully express just how much I love this game when you take into account the DLC. I’m not sure anything will ever take its place on the throne, but then again I would’ve said the same of Skyrim before I played any Souls games, so only time will tell.
2. Skyrim. Probably a boring or predictable choice, but with over 5k hours it’s kinda hard to not include it. I’d probably add Oblivion immediately after this one, but again, I want to make the list interesting so I’ll avoid it here. Skyrim also helped me through the darkest point in my life, so I’ll always hold the game close to my heart, even if new games come along to displace it on my list. I’ve spent so much time modding this game, and it’s one of the things that first brought me and my wife together when we started dating. It might not be my top spot anymore, but it definitely had the biggest impact on my life.
3. Hitman: World of Assassination. This spot was hard to fill honestly. When I think of my favourite games, I usually just think of the Souls series and Skyrim/Oblivion. There’s lots more games I love, but the top spots are all well above the rest. It’s kind of like movies. I have four movies I absolutely adore, and they’re on the highest pedestal. There’s lots more movies I love too, but they don’t compare. Ask me for my top four, that’s an easy answer. Top five? Near impossible. Same deal here, so I just went with playtime and Hitman is my highest remaining game at around 1500 ish hours. It feels weird to call it my third favourite game ever (or I guess seventh because of the other games I’m omitting from this list but you get the point), but so does any other game I considered for here, so I’ll include some honourable mentions below. But back to this game, I feel Hitman is the perfect game for what it is. It can be serious for sure, you’re a hitman taking on contracts, but it can also be completely ridiculous too. One minute you’re tinkering with a race car to make it violently explode on the track to kill your target without anyone suspecting foul play, the next minute you’re dressed as a flamingo exiting the mission by literally flapping your wings and flying from a helipad. 47’s permanent seriousness in the most ludicrous scenarios is peak comedy honestly. Going to a high society Parisian fashion show dressed as a children’s clown and punching out the CEO is a totally normal thing you can do in this game, it’s amazing. And if you don’t like that vibe, you can be a total badass and do a full blown shootout, or a stealthy assassin and eliminate your targets from the shadows with none the wiser. It’s the ultimate hitman/assassin sandbox game.

Honourable mentions: Portal 1 & 2, Pokémon SoulSilver, Hollow Knight, Dishonored, Red Dead Redemption 1 & 2, Batman Arkham Asylum and City, Inside, Gunpoint, any Forza game before the most recent one (haven’t played it), all the Bungie Halo games, and many more. I just love video games I think.