oldest videogame i genuinely appreciate is
1985 (arcadeboard) Gradius
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998 (N64) Banjo’n’Kazooie
1999 (N64) Rayman 2, (PS1) Bloody Roar 2, (PC) Age of Empires 2
2000 (N64) Kirby 64,
2001
2002 (PC) WarCraft 3: RoC & tFT
2003
2004 (PS2) Need For Speed: Underground 2
2005 (PS2) SoulCalibur 3, Tekken 5
2006
2007 (PC) Assassin’s Creed
2008
2009 (PS3) Demon’s Souls
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026


If we’re talking old games that hold up, I would put Rogue (1980) and Nethack (1987) on that list. Rogue is like the basis for 60% of the gaming industry, and Nethack is still being actively developed.
in your own list
make a list and share, that’s the challenge =)