Choose U.F.O. K.O. Tower Defense
Choose U.F.O. K.O. Tower Defense if you want an Action experience. On Steam, it's currently about 75% cheaper on the Steam Store. U.F.O. K.O. Tower Defense launched in 2021.
U.F.O. K.O. Tower Defense vs Paper Protocol
U.F.O. K.O. Tower Defense and Paper Protocol both land in Strategy, Indie, Simulation 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 Strategy, Indie, Simulation on Steam. U.F.O. K.O. Tower Defense (2021) is 3 years older than Paper Protocol (2024). U.F.O. K.O. Tower Defense is currently ~75% cheaper on Steam than Paper Protocol (1.99 USD vs. 7.99 USD). 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 Paper Protocol
Choose Paper Protocol if it's the newer release (2024) and ships with the modern feature baseline. Paper Protocol launched in 2024.
Both U.F.O. K.O. Tower Defense and Paper Protocol sit in Strategy, Indie, and Simulation 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
 U.F.O. K.O. Tower Defense |  Paper Protocol | |
|---|---|---|
| Released | 2021 | 2024 |
| Genres | Action, Strategy, Indie, Simulation, Casual | Strategy, Indie, Simulation, Casual |
| Platforms | Windows | Windows, macOS |
| Steam Deck | Unrated | Unrated |
| Price | 1.99 USD | 7.99 USD |
| Steam reviews | 2 reviews | — |
| Multiplayer | Single-player only | Single-player only |
| Developers | Pixel General LLC | Dairy Devs |
Side by side
- Both share Strategy, Indie, Simulation on Steam.
- U.F.O. K.O. Tower Defense (2021) is 3 years older than Paper Protocol (2024).
- U.F.O. K.O. Tower Defense is currently ~75% cheaper on Steam than Paper Protocol (1.99 USD vs. 7.99 USD).
U.F.O. K.O. Tower Defense vs Paper Protocol — FAQ
- Should I play U.F.O. K.O. Tower Defense or Paper Protocol first?
- If you want chronology, U.F.O. K.O. Tower Defense (2021) came out before Paper Protocol (2024). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
- Are U.F.O. K.O. Tower Defense and Paper Protocol similar?
- They overlap on Strategy, Indie, Simulation 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.