Choose Vaultbreakers
Choose Vaultbreakers if you want a Massively Multiplayer game with DualShock Controller Support, DualSense Controller Support, and Steam Timeline.
Vaultbreakers vs Rules of Engagement: The Grey State
Vaultbreakers and Rules of Engagement: The Grey State both land in Action, Adventure, RPG 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 Action, Adventure, RPG on Steam. Rules of Engagement: The Grey State is free; Vaultbreakers is paid (Price unknown). Both support cooperative play. 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 Rules of Engagement: The Grey State
Choose Rules of Engagement: The Grey State if you want the MMO side of the pairing. On Steam, it's free to play, so the barrier to trying it is zero.
Both Vaultbreakers and Rules of Engagement: The Grey State sit in Action, Adventure, and RPG 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
 Vaultbreakers |  Rules of Engagement: The Grey State | |
|---|---|---|
| Released | — | — |
| Genres | Action, Adventure, Massively Multiplayer, RPG, Free To Play | Action, Adventure, RPG, Free To Play |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Unrated |
| Price | Price unknown | Free to play |
| Steam reviews | — | — |
| Multiplayer | Multi-player, Online Co-op, Co-op | Multi-player, Online Co-op, Co-op |
| Developers | BetaDwarf | Grey State Studio |
Side by side
- Both share Action, Adventure, RPG on Steam.
- Rules of Engagement: The Grey State is free; Vaultbreakers is paid (Price unknown).
- Both support cooperative play.
Vaultbreakers vs Rules of Engagement: The Grey State — FAQ
- Are Vaultbreakers and Rules of Engagement: The Grey State similar?
- They overlap on Action, Adventure, RPG 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 Vaultbreakers and Rules of Engagement: The Grey State have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Vaultbreakers ships Online Co-op, Co-op; Rules of Engagement: The Grey State ships Online Co-op, Co-op.
- Is Rules of Engagement: The Grey State free?
- Yes — Rules of Engagement: The Grey State is a free-to-play Steam title. Vaultbreakers is paid (Price unknown).