Choose Input Chaos
Choose Input Chaos if it matches what drew you to this matchup. Input Chaos launched in 2022.
Input Chaos vs Underground: World War
Input Chaos and Underground: World War 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. Input Chaos (2022) is 4 years older than Underground: World War (2026). Both support cooperative play. 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 Underground: World War
Choose Underground: World War if you want an Early Access game with HDR available. On Steam, it's the newer release (2026) and ships with the modern feature baseline. Underground: World War launched in 2026.
Both Input Chaos and Underground: World War sit in Action and Indie on Steam and both list Multi-player, Shared/Split Screen, and Shared/Split Screen PvP, 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
 Input Chaos |  Underground: World War | |
|---|---|---|
| Released | 2022 | 2026 |
| Genres | Action, Indie | Action, Indie, Early Access |
| Platforms | Windows, Linux | Windows |
| Steam Deck | Unrated | Unrated |
| Price | 3.99 USD | Price unknown |
| Steam reviews | 100% positive (26 reviews) | — |
| Multiplayer | Multi-player, Shared/Split Screen Co-op, Co-op | Multi-player, Shared/Split Screen Co-op, Co-op |
| Developers | anthund | Underworld Interactive |
Side by side
- Both share Action, Indie on Steam.
- Input Chaos (2022) is 4 years older than Underground: World War (2026).
- Both support cooperative play.
Input Chaos vs Underground: World War — FAQ
- Should I play Input Chaos or Underground: World War first?
- If you want chronology, Input Chaos (2022) came out before Underground: World War (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 Input Chaos and Underground: World War 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.
- Do both Input Chaos and Underground: World War have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Input Chaos ships Shared/Split Screen Co-op, Co-op; Underground: World War ships Shared/Split Screen Co-op, Co-op.