Games like Omega Man
Games like Omega Man include LoveChoice, Volcano Princess, Emily is Away <3, Matchmaking Inc., and Sweet Home. We matched them by the tags players give Omega Man on Steam (RPG, Casual, Simulation, Interactive Fiction, and Comic Book): closest matches first, and among equally close ones the better-known games.

LoveChoice
Shared: Dating Sim · Multiple Endings · Simulation

Volcano Princess
Shared: RPG · Multiple Endings · Simulation

Emily is Away <3
Shared: Simulation · Casual · Multiple Endings

Matchmaking Inc.
Shared: Casual · RPG · Dating Sim

Sweet Home
Shared: RPG · Interactive Fiction · Simulation

Vampires' Melody
Shared: Casual · Interactive Fiction · Dating Sim

Legend of Mortal
Shared: RPG · Multiple Endings · Lore-Rich

Stardom 3
Shared: Simulation · Casual · Multiple Endings

Touhou Mystia's Izakaya
Shared: Casual · RPG · Simulation

Emily is Away Too
Shared: Simulation · Casual · Dating Sim

Chinese Parents
Shared: Simulation · Casual · RPG

Love Is All Around
Shared: Dating Sim · Multiple Endings · Interactive Fiction

The Three Kingdoms: Rebirth
Shared: Dating Sim · Multiple Endings · Interactive Fiction

Stardew Valley
Shared: RPG · Simulation · Casual

Love is All Around 2
Shared: Interactive Fiction · RPG · Dating Sim

Senren * Banka
Shared: Casual · Dating Sim · Multiple Endings

Fields of Mistria
Shared: RPG · Simulation · Dating Sim

咸鱼殿下 / My journey
Shared: RPG · Lore-Rich · Dating Sim

Hua Manlou
Shared: Casual · RPG · Simulation

STORY OF SEASONS: Friends of Mineral Town
Shared: Casual · Simulation · RPG

DRAPLINE
Shared: RPG · Simulation · Multiple Endings

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Interactive Fiction · Multiple Endings · Dating Sim

小白兔电商~Bunny e-Shop
Shared: Simulation · Dating Sim · RPG

他人世界末 On-looker
Shared: RPG · Multiple Endings · Casual