IMHO.

Space Captain McCallery - Episode 2: Pilgrims in Purple Moss vs Thunder Kid II: Null Mission

Space Captain McCallery - Episode 2: Pilgrims in Purple Moss and Thunder Kid II: Null Mission 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. Space Captain McCallery - Episode 2: Pilgrims in Purple Moss (2019) is 1 year older than Thunder Kid II: Null Mission (2020). Both sit near 100% positive on Steam (Space Captain McCallery - Episode 2: Pilgrims in Purple Moss: 13 reviews, Thunder Kid II: Null Mission: 12). 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 Space Captain McCallery - Episode 2: Pilgrims in Purple Moss

Choose Space Captain McCallery - Episode 2: Pilgrims in Purple Moss if you want an Adventure experience. Space Captain McCallery - Episode 2: Pilgrims in Purple Moss launched in 2019.

Choose Thunder Kid II: Null Mission

Choose Thunder Kid II: Null Mission if it's currently about 20% cheaper on the Steam Store. Thunder Kid II: Null Mission launched in 2020.

Both Space Captain McCallery - Episode 2: Pilgrims in Purple Moss and Thunder Kid II: Null Mission sit in Action and Indie on Steam, so either pick lands in the same broad neighborhood. Steam reviews are nearly tied (100% vs 100% positive), so genre fit is the cleanest tiebreaker — scroll the table for the feature-by-feature view.

Side-by-side comparison

Space Captain McCallery - Episode 2: Pilgrims in Purple Moss vs Thunder Kid II: Null Mission — Steam metadata comparison
Space Captain McCallery - Episode 2: Pilgrims in Purple Moss — Steam game coverSpace Captain McCallery - Episode 2: Pilgrims in Purple MossThunder Kid II: Null Mission — Steam game coverThunder Kid II: Null Mission
Released20192020
GenresAction, Indie, AdventureAction, Indie
PlatformsWindows, macOSWindows
Steam DeckUnratedUnrated
Price4.99 USD3.99 USD
Steam reviews100% positive (13 reviews)100% positive (12 reviews)
MultiplayerSingle-player onlySingle-player only
DevelopersRenegade Sector GamesRenegade Sector Games

Side by side

Space Captain McCallery - Episode 2: Pilgrims in Purple Moss vs Thunder Kid II: Null Mission — FAQ

Should I play Space Captain McCallery - Episode 2: Pilgrims in Purple Moss or Thunder Kid II: Null Mission first?
If you want chronology, Space Captain McCallery - Episode 2: Pilgrims in Purple Moss (2019) came out before Thunder Kid II: Null Mission (2020). 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 Space Captain McCallery - Episode 2: Pilgrims in Purple Moss and Thunder Kid II: Null Mission similar?
They overlap on Action, 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.