Suroi.io

You spawn on an island with nothing. Break crates, loot structures, grab weapons and armor, and eliminate every other player before the gas closes in. Last one alive wins a chicken dinner.

Suroi.io is a free, open-source 2D top-down battle royale built by volunteers and inspired by the now-defunct Surviv.io. The entire game is developed by the community through its public GitHub repository (HasangerGames/suroi) and supported by donations — there are no paid developers or publisher. It runs free in any browser with no download on PC and mobile across 4 server regions. Controls are fully remappable in-game.

Contents

1. Controls
2. The Gas Zone
3. Loot — Weapons, Armor, and Ammo
4. Healing and Adrenaline
5. Game Modes
6. Tips
7. Similar Games
8. FAQ

Controls

All of these are defaults. Every keybind is remappable in-game via the Rules & Tutorial menu — the full list is also found there. Two controls players often miss early: F to pick up items (not auto-collected) and X to cancel a healing animation if caught mid-heal.

The Gas Zone

A deadly orange gas fills the map throughout every match. It begins at the edges and progressively shrinks toward the center, forcing players into an ever-smaller safe area. The official rules page confirms: the damage dealt by the gas increases each time the zone shrinks — being caught in late-game gas is far more punishing than early-game exposure. Healing items cannot outpace late-stage gas damage at full tick rate, so staying inside the safe zone is non-negotiable as the match progresses.

Loot — Weapons, Armor, and Ammo

All loot starts on the ground inside structures and destructible objects. Break crates, barrels, and boxes by left-clicking or shooting them — they drop weapons, ammo, healing items, and armor. Abandoned houses and closets also contain loot. Airdrops that land during the match carry high-tier items.

Weapon categories in the game:

• Pistols — low damage, good availability early, decent for early skirmishes
• Shotguns — high close-range burst, poor at distance
• SMGs — fast fire rate, mid range, high ammo consumption
• Assault Rifles — balanced damage, fire rate, and range — the most versatile category
• DMRs — semi-automatic, higher damage per shot than ARs, good at range
• Sniper Rifles — high single-shot damage, slow rate of fire
• LMGs — high sustained fire, large magazine
• Melee — last resort, no ammo required
• Explosives — grenades and similar devices for area denial

Armor comes in vests at different protection levels. Scopes extend your effective aim range and are found as separate loot pickups — a 4x or 8x scope dramatically changes how far you can safely engage targets.

Healing and Adrenaline

Suroi.io splits recovery into two separate systems — health and adrenaline — which is one of its key differences from simpler battle royales.

Adrenaline does not heal directly — it increases movement speed and triggers passive health regeneration while the bar is active. In combat, high adrenaline means you move faster and recover health without using a Medkit. Save Medkits for critical heals; use Gauze for minor damage to conserve them. Use Cola and Tablets proactively before engagements rather than reactively after taking hits.

Game Modes

Seasonal modes rotate in and out — they are not permanently available. When active, they replace or augment Normal mode. Harvest mode’s removal of automatic weapons is the most mechanically significant change — it forces a different playstyle from Normal on every player in the lobby, not just those who prefer it.

Tips

▸ Pick up everything at spawn, sort it out after

The first 30 seconds of every match are the highest-risk period. Other players are also looting nearby and the first encounter is often before either player is properly armed. Break crates and move — don’t stop to examine each item carefully at spawn. Grab any weapon immediately and optimize your inventory once you’ve established distance from the starting crowd.

▸ Press F to interact — items don’t auto-collect

New players regularly run over loot wondering why nothing is being picked up. Items must be picked up manually with F. When you see an item you want, press F while near it — the game will equip or add it to inventory. This is the single most common early confusion in the game.

▸ Use Gauze for small heals, save Medkits for critical moments

Medkits heal fully but take several seconds to use — during which you’re stationary and vulnerable. Gauze heals a fraction but uses faster and can be cancelled with X if needed. Minor chip damage from a fight doesn’t justify a Medkit. Save them for when you’re genuinely low and in a safe position.

▸ Keep your adrenaline bar topped up before fights

Adrenaline (from Cola and Tablets) provides both movement speed and passive health regen while active. Entering a fight with full adrenaline means you move faster than your opponent and recover health during the engagement if you take minor hits. Use adrenaline items proactively while rotating between safe positions, not reactively after damage is already done.

▸ Use cover to peek — don’t stand in the open

The top-down perspective means you can see around corners that your character appears to be behind. Position behind trees, walls, and crates and peek out to shoot, then retreat. Standing in open ground removes all positional advantage and makes you an easy target from any angle. Structures and crates that block vision matter as much as ones that block bullets.

▸ Watch the map constantly in the final circle

Late game, the gas damage is high enough that a few seconds of exposure threatens elimination. Open the map (G or M) regularly to track where the safe zone is heading and position inside it before the shrink, not while it’s happening. Players who are already inside the next safe zone have time to prepare; players rotating into it under pressure are exposed and predictable.

Similar Games

• Suroi.io
• reKILL
• Shell Shockers

FAQ

Discuss Suroi.io