Like more than one of them
4 games close to two or more of Costume Quest, Stardew Valley and Garry's Mod
Garden Paws
Stardew Valley, but a shopkeeping game, and half the hours
Loved · 90%Farming Sim · AgricultureAlso like Garry's Mod
Terraria
Garry's Mod, but about survival, and with crafting
Loved · 97%Sandbox · BuildingAlso like Stardew Valley
The Sims 4
Stardew Valley, but free to play, and realistic
Liked · 86%Life Sim · BuildingAlso like Garry's Mod
More like Costume Quest
5 games closest to Costume Quest of your picks
Pit People
Costume Quest, but a turn-based tactics game, and co-op
Loved · 93%Turn-Based Combat · Comedy
South Park: The Stick of Truth
Costume Quest, but 2D, and even better loved
Loved · 98%Comedy · Turn-Based
Wartales
Costume Quest, but medieval, and five times the hours
Liked · 85%Turn-Based Strategy · Turn-Based Combat
More like Stardew Valley
9 games closest to Stardew Valley of your picks
Infinity Nikki
Stardew Valley, but free to play, and a fifth of the hours
Divisive · 58%Farming Sim · Life Sim
Graveyard Keeper
Stardew Valley, but a management game, and more divisive
Liked · 85%Agriculture · Crafting
Fields of Mistria
Stardew Valley, but single-player, and half the hours
Loved · 97%Farming Sim · Life Sim
More like Garry's Mod
12 games closest to Garry's Mod of your picks
Fireworks Mania - An Explosive Simulator
Garry's Mod, but a hobby sim, and a tenth of the hours
Loved · 97%Sandbox · Physics
Scrap Mechanic
Garry's Mod, but a survival crafting game, and with base building
Loved · 92%Building · Physics
Fun with Ragdolls: The Game
Garry's Mod, but 3D, and a tenth of the hours
Liked · 88%Physics · Sandbox
Totally Accurate Battle Simulator
Garry's Mod, but an auto battler, and a third of the hours
Loved · 98%Sandbox · Physics
Saints Row: The Third
Garry's Mod, but a third-person shooter, and half the hours
Loved · 96%Sandbox · Comedy
How this list is made
Each game is measured against each of your picks the way a games-like list measures it: the Steam community tags, Steam genres and IGDB themes they share, each counting for more the fewer games carry it. A game's place is how alike it is to your picks together, as a share of each pick's best match, so one alike to two of them comes before one alike to just one. It must be close to at least one of them, as close as it would have to be on that game's own list.
None of your picks is on the list, nor a second release of one, nor a game of their own series. Up to 30 games are shown. Under each name, the kinds it shares with the pick it is closest to, and how it differs from that pick.