Choose Alterum
Choose Alterum if you want the Online PvP, PvP, and Surround Sound side of the pairing. Alterum launched in 2026.
Alterum vs Hollow Deep
Alterum and Hollow Deep both land in Action, Indie 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, Indie on Steam. 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 Hollow Deep
Choose Hollow Deep if you want a Massively Multiplayer game with DualShock Controller Support, DualSense Controller Support, and Steam Input API Support.
Both Alterum and Hollow Deep sit in Action and Indie on Steam and both list Multi-player, Online Co-op, and Camera Comfort, 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
 Alterum |  Hollow Deep | |
|---|---|---|
| Released | 2026 | — |
| Genres | Action, Indie | Action, Indie, Massively Multiplayer |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Unrated |
| Price | Price unknown | Price unknown |
| Steam reviews | — | — |
| Multiplayer | Multi-player, Online Co-op, Co-op | Multi-player, Online Co-op, Co-op |
| Developers | Hot Winter | Mindtusk, Screw Software |
Side by side
- Both share Action, Indie on Steam.
- Both support cooperative play.
Alterum vs Hollow Deep — FAQ
- Are Alterum and Hollow Deep similar?
- They overlap on Action, Indie 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 Alterum and Hollow Deep have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Alterum ships Online Co-op, Co-op; Hollow Deep ships Online Co-op, Co-op.