Serious Sam HD: The Second Encounter and Project Athenia 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. Serious Sam HD: The Second Encounter (2010) is 18 years older than Project Athenia (2028). Project Athenia is free; Serious Sam HD: The Second Encounter is paid (19.99 USD). No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.
Choose Serious Sam HD: The Second Encounter if you want the Steam Leaderboards, Online Co-op, and Co-op side of the pairing. On Steam, it has co-op, so you can bring a friend. Serious Sam HD: The Second Encounter launched in 2010.
Choose Project Athenia if you want a Free To Play experience. On Steam, it's free to play, so the barrier to trying it is zero. Project Athenia launched in 2028.
Both Serious Sam HD: The Second Encounter and Project Athenia sit in Action and Indie on Steam and both list Multi-player, Online PvP, and 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.
 Serious Sam HD: The Second Encounter |  Project Athenia | |
|---|---|---|
| Released | 2010 | 2028 |
| Genres | Action, Indie | Action, Indie, Free To Play |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Unrated |
| Price | 19.99 USD | Free to play |
| Steam reviews | 89.3% positive (319 reviews) | — |
| Multiplayer | Multi-player, Online Co-op, Co-op | Multi-player |
| Developers | Croteam | paasmoo |
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