IMHO.

Block Buster Billy vs Theta and Paralldox on Worldlines

Block Buster Billy and Theta and Paralldox on Worldlines both land in 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 are Indie games on Steam. Block Buster Billy (2023) is 3 years older than Theta and Paralldox on Worldlines (2026). Theta and Paralldox on Worldlines is currently ~0% cheaper on Steam than Block Buster Billy (9.99 USD vs. 9.99 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 Block Buster Billy

Choose Block Buster Billy if you want a Strategy and Casual game with Color Alternatives, Camera Comfort, and Mouse Only Option. On Steam, it's Steam Deck Verified, so handheld play works out of the box. Block Buster Billy launched in 2023.

Choose Theta and Paralldox on Worldlines

Choose Theta and Paralldox on Worldlines if you want the Save Anytime side of the pairing. On Steam, it's the newer release (2026) and ships with the modern feature baseline. Theta and Paralldox on Worldlines launched in 2026.

Both Block Buster Billy and Theta and Paralldox on Worldlines sit in Indie on Steam and both list Custom Volume Controls, Playable without Timed Input, and Keyboard Only Option, 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

Block Buster Billy vs Theta and Paralldox on Worldlines — Steam metadata comparison
Block Buster Billy — Steam game coverBlock Buster BillyTheta and Paralldox on Worldlines — Steam game coverTheta and Paralldox on Worldlines
Released20232026
GenresStrategy, Indie, CasualIndie
PlatformsWindowsWindows
Steam DeckDeck VerifiedDeck Playable
Price9.99 USD9.99 USD
Steam reviews8 reviews90.2% positive (41 reviews)
MultiplayerSingle-player onlySingle-player only
DevelopersBigosaurXXela

Side by side

Block Buster Billy vs Theta and Paralldox on Worldlines — FAQ

Should I play Block Buster Billy or Theta and Paralldox on Worldlines first?
If you want chronology, Block Buster Billy (2023) came out before Theta and Paralldox on Worldlines (2026). 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 Block Buster Billy and Theta and Paralldox on Worldlines similar?
They overlap on 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.
Block Buster Billy vs Theta and Paralldox on Worldlines · imho.run