If Disco Elysium is a RPG, and I'm not saying it isn't, then Severance: Blade of Darkness is also a RPG. Think about it.
Disco only has dialogue, but there is some RPG stuff in it (skills, levels, etc.) that just pertains to the dialogue. Severance is the same, just swapping the word dialogue for combat. You level up, you get equipment, there's even a couple of NPCs. The game is all combat all the time. But there's RPG stuff in it.
And if Severance is a RPG, then it definitely should be in the Codex 101 list. 'Cos it's a way better game than Oblivion, Undertale, Mass Effect, Dark Souls 3, etc.
Maybe this isn't even the right place to post this. I'm thinking this is a serious debate to be had.