What's the last game you played for hours without breaks?

I've been getting back into some of the second-gen classics. Halo Reach is fantastic as always (campaign, firefight, and slayer all still hold-up stunningly well), I've started a new Fallout 3 game (probably my favourite game of all-time), and I'm getting back into COD World at War's campaign after a good 8+ years. Additionally, when quarantine first started, I found myself playing the Witcher 3 for the first time - needless to say, there were many times when evening somehow turned into morning.