Choose TERA - Action MMORPG
Choose TERA - Action MMORPG if you want an Adventure game with Online PvP, Online Co-op, and Co-op. On Steam, it has co-op, so you can bring a friend. TERA - Action MMORPG launched in 2017.
TERA - Action MMORPG vs Ergo Sum
TERA - Action MMORPG and Ergo Sum both land in Action, Massively Multiplayer, 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, Massively Multiplayer, RPG on Steam. Ergo Sum is free; TERA - Action MMORPG is paid (Price unknown). TERA - Action MMORPG has co-op; Ergo Sum does not. 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 Ergo Sum
Choose Ergo Sum if you want an Indie experience. On Steam, it's free to play, so the barrier to trying it is zero.
Both TERA - Action MMORPG and Ergo Sum sit in Action, Massively Multiplayer, and RPG on Steam and both list Multi-player, MMO, 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.
Side-by-side comparison
 TERA - Action MMORPG |  Ergo Sum | |
|---|---|---|
| Released | 2017 | — |
| Genres | Action, Adventure, Massively Multiplayer, RPG, Free To Play | Action, Indie, Massively Multiplayer, RPG, Free To Play |
| Platforms | Windows | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | Price unknown | Free to play |
| Steam reviews | 80.8% positive (104 reviews) | — |
| Multiplayer | Multi-player, Online Co-op, Co-op | Multi-player |
| Developers | Bluehole, Inc. | Ergo Sum |
Side by side
- Both share Action, Massively Multiplayer, RPG on Steam.
- Ergo Sum is free; TERA - Action MMORPG is paid (Price unknown).
- TERA - Action MMORPG has co-op; Ergo Sum does not.
- TERA - Action MMORPG is Deck Playable on Steam Deck; Ergo Sum has no Deck rating yet.
TERA - Action MMORPG vs Ergo Sum — FAQ
- Are TERA - Action MMORPG and Ergo Sum similar?
- They overlap on Action, Massively Multiplayer, 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.
- Is Ergo Sum free?
- Yes — Ergo Sum is a free-to-play Steam title. TERA - Action MMORPG is paid (Price unknown).
- Does TERA - Action MMORPG run on Steam Deck?
- Yes — TERA - Action MMORPG is rated Deck Playable by Valve. Ergo Sum doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.