Choose Boomsday
Choose Boomsday if you want the Online PvP, Online Co-op, and LAN PvP side of the pairing.
Boomsday vs Shadow Slayer
Boomsday and Shadow Slayer 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 Shadow Slayer
Choose Shadow Slayer if you want a Casual and Early Access game with Keyboard Only Option, Mouse Only Option, and Save Anytime. Shadow Slayer launched in 2026.
Both Boomsday and Shadow Slayer sit in Action and Indie on Steam and both list Multi-player, Shared/Split Screen, and Shared/Split Screen PvP, 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
 Boomsday |  Shadow Slayer | |
|---|---|---|
| Released | — | 2026 |
| Genres | Action, Indie | Action, Indie, Casual, Early Access |
| Platforms | Windows, macOS, Linux | Windows |
| Steam Deck | Unrated | Unrated |
| Price | Price unknown | 5.00 USD |
| Steam reviews | — | — |
| Multiplayer | Multi-player, Cross-Platform Multiplayer, Online Co-op | Multi-player, Shared/Split Screen Co-op, Co-op |
| Developers | Floor Wardens | Solvaris |
Side by side
- Both share Action, Indie on Steam.
- Both support cooperative play.
Boomsday vs Shadow Slayer — FAQ
- Are Boomsday and Shadow Slayer 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 Boomsday and Shadow Slayer have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Boomsday ships Online Co-op, Shared/Split Screen Co-op; Shadow Slayer ships Shared/Split Screen Co-op, Co-op.