Games like Impostor Online — Ultimate
Games like Impostor Online — Ultimate include Among Us, Liars Bar, Phasmophobia, Pummel Party, and Agrou. We matched them by the tags players give Impostor Online — Ultimate on Steam (Board Game, Social Deduction, Jump Scare, Casual, and Strategy): closest matches first, and among equally close ones the better-known games.

Among Us
Shared: Social Deduction · Multiplayer · Online Co-Op

Liars Bar
Shared: Co-op · Casual · Multiplayer

Phasmophobia
Shared: Co-op · Multiplayer · Online Co-Op

Pummel Party
Shared: Board Game · Multiplayer · Co-op

Agrou
Shared: Casual · Strategy · Social Deduction

UNO
Shared: Board Game · Multiplayer · Casual

Bloons TD 6
Shared: Co-op · Strategy · Multiplayer

Pacify
Shared: Co-op · Multiplayer · Online Co-Op

PUBG: BATTLEGROUNDS
Shared: Multiplayer · Co-op · Online Co-Op

Town of Salem
Shared: Social Deduction · Strategy · Multiplayer

Feign
Shared: Social Deduction · Multiplayer · Online Co-Op

Dead by Daylight
Shared: Co-op · Multiplayer · Online Co-Op

MECCHA CHAMELEON
Shared: Casual · Multiplayer · Online Co-Op

Party Animals
Shared: Casual · Co-op · Multiplayer

Overcooked! 2
Shared: Co-op · Multiplayer · Casual

Escape the Backrooms
Shared: Co-op · Multiplayer · Online Co-Op

100% Orange Juice
Shared: Board Game · Strategy · Multiplayer

Dale & Dawson Stationery Supplies
Shared: Social Deduction · Casual · Multiplayer

Richman10
Shared: Casual · Board Game · Multiplayer

How to Fish
Shared: Co-op · Multiplayer · Online Co-Op

Gang Beasts
Shared: Co-op · Multiplayer · Casual

Who's Your Daddy?!
Shared: Multiplayer · Co-op · Strategy

RV There Yet?
Shared: Co-op · Multiplayer · Online Co-Op

Draw & Guess
Shared: Casual · Multiplayer · Online Co-Op