Choose Portal 2
Choose Portal 2 if you want an Action game with Multi-player, Shared/Split Screen, and Online Co-op. On Steam, it's Steam Deck Verified, so handheld play works out of the box. 169,764 Steam reviews back the pick.
Portal 2 vs DEAD INTERNET THEORY: SUPERSTARS
Portal 2 and DEAD INTERNET THEORY: SUPERSTARS both land in Adventure 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 are Adventure games on Steam. Portal 2 has co-op; DEAD INTERNET THEORY: SUPERSTARS does not. Portal 2 is Deck Verified on Steam Deck; DEAD INTERNET THEORY: SUPERSTARS has no Deck rating yet. 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 DEAD INTERNET THEORY: SUPERSTARS
Choose DEAD INTERNET THEORY: SUPERSTARS if it's a focused single-player run rather than a multiplayer commitment.
Both Portal 2 and DEAD INTERNET THEORY: SUPERSTARS sit in Adventure on Steam, 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
 Portal 2 |  DEAD INTERNET THEORY: SUPERSTARS | |
|---|---|---|
| Released | 2011 | — |
| Genres | Action, Adventure | Adventure |
| Platforms | Windows, Linux | Windows |
| Steam Deck | Deck Verified | Unrated |
| Price | 9.99 USD | Price unknown |
| Steam reviews | 98.9% positive (169,764 reviews) | — |
| Multiplayer | Multi-player, Online Co-op, Shared/Split Screen Co-op | Single-player only |
| Developers | Valve | FIAgames |
Side by side
- Both are Adventure games on Steam.
- Portal 2 has co-op; DEAD INTERNET THEORY: SUPERSTARS does not.
- Portal 2 is Deck Verified on Steam Deck; DEAD INTERNET THEORY: SUPERSTARS has no Deck rating yet.
Portal 2 vs DEAD INTERNET THEORY: SUPERSTARS — FAQ
- Are Portal 2 and DEAD INTERNET THEORY: SUPERSTARS similar?
- They overlap on Adventure 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.
- Does DEAD INTERNET THEORY: SUPERSTARS have multiplayer like Portal 2?
- No. Portal 2 supports multiplayer on Steam (Multi-player, Online Co-op, Shared/Split Screen Co-op), while DEAD INTERNET THEORY: SUPERSTARS is listed as single-player only.
- Does Portal 2 run on Steam Deck?
- Yes — Portal 2 is rated Deck Verified by Valve. DEAD INTERNET THEORY: SUPERSTARS doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.