A lightweight battle royale built for budget Android devices. Fifty-player matches on a single map, the cartoon-styled visual language of Fortnite, and the moment-to-moment shooting feel of Free Fire, all in a 230 MB install that runs on a 5.0 phone with 2 GB of RAM.
What is Sigma
Sigma is a third-person battle royale shooter from Studio Arm Private Limited. The basic loop will feel familiar to anyone who has played Garena Free Fire or PUBG Mobile: parachute onto a deserted island with 49 other players, scavenge weapons and armour from buildings, watch the play zone shrink, and try to be the last one standing.
The game leans toward the lower end of the device spectrum. The whole experience runs on Android 5.0 with 2 GB of RAM, the install footprint stays under 250 MB, and the cartoon-styled art keeps the GPU load light. That makes it one of the few battle royale options for people on cheap or older phones who cannot run the official Free Fire build smoothly.
Modes include the standard 50-player solo and squad rounds, a 4v4 quick deathmatch for shorter sessions, and a separate sniper-only playlist. Twenty-plus weapons cover the usual classes: assault rifles, SMGs, shotguns, snipers, and a small set of melee tools.
Key features
Single-map drops with the shrinking zone, vehicles, loot crates, and the standard battle royale endgame.
Built-in voice for 4-player squads, with quick-ping callouts for players without headsets.
230 MB install with Android 5.0 floor. Runs at a usable framerate on 2 GB RAM phones where Free Fire stutters.
Assault rifles, SMGs, shotguns, snipers, plus a sniper-only playlist for the long-range crowd.
Dozens of unlockable character looks, gun skins, parachute trails, and victory emotes.
Stylised characters and bright island palette, closer to Fortnite’s art direction than the realistic look of PUBG Mobile.
Screenshots
App info
- Developer
- Studio Arm Private Limited
- Package
com.studioarm.sigma- Version
- 1.1.0
- Size
- 230 MB
- Min Android
- 5.0+
- Category
- Games / Action
- Rating
- 3.9 (3,381 reviews)
- Cost
- Free, with optional in-app cosmetics
What this mod offers
-
Unlimited diamonds in the shop
Premium currency is set to a high value at the start. The cosmetic shop, character pass, and gun-skin store all unlock without grinding matches for currency.
-
All character skins available
The seasonal and event-locked outfits show as already-owned in the loadout screen. No event grind or limited-time window applies in this build.
-
Weapon and parachute skins unlocked
The full gun-cosmetic roster, parachute trails, and victory emotes are accessible from the wardrobe immediately.
-
No mandatory ads
The post-match ad break and the rewarded-ad prompts are stripped out of this build. Matches end straight back to the lobby.
How to install
- Download the APK
Use the green button at the top of this page. The file is roughly 230 MB. On a 4G or 5G connection the download takes a couple of minutes.
- Enable installs from this source
On Android 8 and above, the system prompts you the first time it sees an APK from your browser. Tap the prompt and toggle the install permission on for that browser only.
- Open the downloaded APK
Tap the file in your Downloads folder or in the browser’s download notification. The Android package installer opens and shows the requested permissions.
- Tap Install
Confirm the install. Wait for the progress bar to finish, then tap Open to launch the game.
- First-run setup
Accept the standard permissions for storage and microphone (microphone is for in-match voice). The lobby loads with the mod balance and unlocked wardrobe already applied.
What’s new in 1.1.0
- New cartoon-island map regions with extra loot zones around the central docks.
- Sniper-only playlist added as a permanent rotation alongside the 50-player and 4v4 modes.
- Twelve new character skins and three new gun-skin lines, all accessible from launch in this mod build.
- Performance pass on rendering for older Adreno and Mali GPUs, smoothing the framerate on 2 GB RAM phones.
- Squad voice chat reliability fixes on weaker mobile data connections.
FAQ
- Is Sigma the same as Free Fire?
- No. Sigma is a separate game from Studio Arm Private Limited. It uses the same battle royale formula and a similar cartoon-styled look, but the engine, character roster, and progression are independent. Free Fire is published by Garena. Sigma is often picked up by players whose phones cannot run Free Fire smoothly.
- Is Sigma on the Google Play Store?
- Sigma is not currently listed on Google Play in most regions. Studio Arm distributes the build through their own channels and through APK aggregators. Some readers may find it on Play in a small number of markets. If you cannot find it on Play, the APK on this page mirrors the same official release used by sites like ApkPure and HappyMod.
- How is the mod build different from the original?
- The game modes, maps, and shooting feel are identical. The mod build sets the premium-currency balance high so the cosmetic shop, character pass, and gun-skin store are accessible without grinding matches. The post-match ad break is also stripped out.
- What Android phone do I need to run Sigma?
- Sigma 1.1.0 runs on Android 5.0 and above. The install is around 230 MB. The minimum spec is 2 GB of RAM. That makes it one of the few battle royales with a real shot at running on entry-level Android phones from 2018 and later.
- Is the Sigma mod APK safe to install?
- The build mirrored on this page is the file packaged on the AN1 source. We do not modify the package after fetching. The Sigma mod is a community-built variant, not affiliated with Studio Arm. Treat any sideloaded APK like a permissions audit: only grant the storage and microphone access the game asks for, and skip any prompt outside the game.
- Can I play Sigma offline?
- The lobby, wardrobe, and settings work offline, but every match needs an active internet connection. The matchmaking and the 50-player session run on Studio Arm’s servers, so the actual battle royale rounds require data or Wi-Fi.
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