Choose Killer: Infected One of Us
Choose Killer: Infected One of Us if you want a Massively Multiplayer experience. Killer: Infected One of Us launched in 2021.
Killer: Infected One of Us vs Impostor Online
Killer: Infected One of Us and Impostor Online both land in Indie, Casual on Steam, which is why they keep getting compared. The comparison below is built from each game's Steam metadata — release year, genres, categories, Steam Deck status, price, and review score — refreshed daily by imho.run's scraper. Headline differences: Both share Indie, Casual on Steam. Killer: Infected One of Us (2021) is 4 years older than Impostor Online (2025). Impostor Online scores higher on Steam reviews (65.2% positive) than Killer: Infected One of Us (45.5% positive). No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.
Which should you pick?
Choose Impostor Online
Choose Impostor Online if you want a Free To Play and Early Access experience. On Steam, it's free to play, so the barrier to trying it is zero. Impostor Online launched in 2025.
Both Killer: Infected One of Us and Impostor Online sit in Indie and Casual on Steam and both list Multi-player, Online PvP, and Online Co-op, so either pick lands in the same broad neighborhood. Use the side-by-side table for the feature view, or follow the "Games like" links below to see ranked alternatives for either title.
Side-by-side comparison
 Killer: Infected One of Us |  Impostor Online | |
|---|---|---|
| Released | 2021 | 2025 |
| Genres | Indie, Massively Multiplayer, Casual | Indie, Free To Play, Casual, Early Access |
| Platforms | Windows | Windows, macOS |
| Steam Deck | Unrated | Unrated |
| Price | 6.99 USD | Free to play |
| Steam reviews | 45.5% positive (121 reviews) | 65.2% positive (23 reviews) |
| Multiplayer | Multi-player, Online Co-op, Co-op | Multi-player, Online Co-op, Co-op |
| Developers | DreamTeamGames | SkullSocket Studios |
Side by side
- Both share Indie, Casual on Steam.
- Killer: Infected One of Us (2021) is 4 years older than Impostor Online (2025).
- Impostor Online scores higher on Steam reviews (65.2% positive) than Killer: Infected One of Us (45.5% positive).
- Impostor Online is free; Killer: Infected One of Us is paid (6.99 USD).
- Both support cooperative play.
Killer: Infected One of Us vs Impostor Online — FAQ
- Should I play Killer: Infected One of Us or Impostor Online first?
- If you want chronology, Killer: Infected One of Us (2021) came out before Impostor Online (2025). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
- Are Killer: Infected One of Us and Impostor Online similar?
- They overlap on Indie, Casual on Steam, so the catalogue groups them together — but "similar" depends on the specific mechanics. Use the genre + category rows above to decide whether the overlap matches what drew you to the one you've already played.
- Do both Killer: Infected One of Us and Impostor Online have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Killer: Infected One of Us ships Online Co-op, Co-op; Impostor Online ships Online Co-op, Co-op.
- Is Impostor Online free?
- Yes — Impostor Online is a free-to-play Steam title. Killer: Infected One of Us is paid (6.99 USD).