PC Games to play in local co-op?

Local Cooperative PC Games

JuegoSteamGoGEpic
A Hat in TimeSteamGoGEpic
A Way OutSteamEpic
Basketball ClassicsSteam
Battleblock TheaterSteam
Beyond Two SoulsSteamEpic
Castle CrashersSteamGoG
CupheadSteamGoG
Dariusburst Chronicle SaviorsSteam
GuacameleeSteamGoG
HelldiversSteamGoG
Heavenly BodiesSteam
Ibb & ObbSteam
It takes twoSteamEpic
Katanari Damacy RerollSteam
Lego Games (Marvel, LOTR, Indiana Jones, Star Wars)Steam
Lovers in a Dangerous SpacetimeSteamGoG
MagickaSteamGoG
Moving OutSteamEpic
OvercookedSteamGoG
Pinball FX3Steam
PlateUpSteam
Portal 2SteamGoG
Project ZomboidSteamGoG
Rogue Heroes: Ruins of TasosSteam
Rocket LeagueEpic
Roots of PatchaSteam
SkullgirlsSteam
Sonic All Stars Racing TransformedSteam
SpiritfarerSteamGoG
Stardew ValleySteamGoG
Strikey SistersSteam
Sun HavenSteam
TrineSteamGoG
Trine 2SteamGoG
UnrailedSteamEpic
UnravelSteam
Unravel TwoSteamEpic
WingspanSteamGoG

Edit

I love this community, got so many recomendations I decided to update the first post! Sorry if I couldn't reply to everyone, Jerboa almost exploded, haha. But I'll upvote all your contributions now that I'm on PC.

Original post

I like to play on the same computer with my bf, and recently we've started to get tired of MAME since we've been playing our faves on repeat for so long.

The other game we play is Spelunky, since is the only local co-op game I have on Steam. I ask because Steam summer sales are close and I can give him a surprise :D

Thanks!