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Rival Megagun Rival Megagun is a competitive split-screen shoot 'em up where you transform into a giant boss ship and battle your rival head-to-head in local or online PVP.
Public builds
—No reading yet
Counted once we have watched for 90 days (since 21 Oct 2026)
Distinct builds deployed to a game's public (default) Steam branch, as Steam's client network describes them.
Checked within minutes of each Steam change. Observed since 21 Oct 2026.
Source: Steam client network (PICS), App info, public branch. Full methodology
Latest public build
Build 20253665
Update posts
0 postsPosts announcing an update, tagged or not
Posts in a game's official Steam news feed that announce an update: tagged as patch notes by the developer, or plainly about a patch or a released update.
Source: Steam Web API, ISteamNews/GetNewsForApp. Full methodology
Typical gap between builds
Not enough builds yetPublic Builds| Build | Went live | Patch notes |
|---|---|---|
| 20253665 | None posted |
From Steam’s client network, last checked . Builds before 21 Oct 2026, when we started watching, aren't listed. Patch notes are the developer’s update post from an hour before to a day after the build. Not every build gets one. How we count
Earlier Updates| Posted | Update |
|---|---|
| 16 Jun 2020 | Massive Rival Megagun c1.1.1 patch! Update |
| 10 Jan 2019 | Rival Megagun c1.0.13 patch notes Patch notes |
| 12 Dec 2018 | Rival Megagun c1.0.12 patch notes Patch notes |
| 7 Dec 2018 | Rival Megagun c1.0.11 patch notes Patch notes |
Steam keeps no record of past build numbers, so before 21 Oct 2026 a game’s update history comes from its own Steam news: posts tagged as patch notes, and untagged posts that plainly announce a patch or a released update. Older posts are still being read in, most played games first. How we count
