Choose They Are Billions
Choose They Are Billions if you want the Steam Leaderboards side of the pairing. 18,746 Steam reviews back the pick.
They Are Billions vs Zombie Defense Shelter
They Are Billions and Zombie Defense Shelter both land in Strategy 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 Strategy games on Steam. They Are Billions (2019) is 1 year older than Zombie Defense Shelter (2020). Zombie Defense Shelter is currently ~67% cheaper on Steam than They Are Billions (9.99 USD vs. 29.99 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 Zombie Defense Shelter
Choose Zombie Defense Shelter if you want an Indie and Casual experience. On Steam, it's currently about 67% cheaper on the Steam Store. Zombie Defense Shelter launched in 2020.
Both They Are Billions and Zombie Defense Shelter sit in Strategy 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
 They Are Billions |  Zombie Defense Shelter | |
|---|---|---|
| Released | 2019 | 2020 |
| Genres | Strategy | Strategy, Indie, Casual |
| Platforms | Windows | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | 29.99 USD | 9.99 USD |
| Steam reviews | 80.2% positive (18,746 reviews) | — |
| Multiplayer | Single-player only | Single-player only |
| Developers | Numantian Games | Niko Belik |
Side by side
- Both are Strategy games on Steam.
- They Are Billions (2019) is 1 year older than Zombie Defense Shelter (2020).
- Zombie Defense Shelter is currently ~67% cheaper on Steam than They Are Billions (9.99 USD vs. 29.99 USD).
- They Are Billions is Deck Playable on Steam Deck; Zombie Defense Shelter has no Deck rating yet.
They Are Billions vs Zombie Defense Shelter — FAQ
- Should I play They Are Billions or Zombie Defense Shelter first?
- If you want chronology, They Are Billions (2019) came out before Zombie Defense Shelter (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 They Are Billions and Zombie Defense Shelter similar?
- They overlap on Strategy 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 They Are Billions run on Steam Deck?
- Yes — They Are Billions is rated Deck Playable by Valve. Zombie Defense Shelter doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.