Dead Island Riptide is a full standalone sequel to Dead Island. It features most of the firearms seen from the previous game, as well as some newer weapons.
The following weapons appear in the video game Dead Island: Riptide:
Pistols in Riptide are the most commonly found firearm in the game that can be looted from crates and are used by several NPCs, including hostile human enemies. All weapons in this category shares the same 'Pistol Ammo' despite the obvious size differences between 9mm pistols and magnum-calibre revolvers.
Beretta 92FS
The Beretta 92FS returns from the first game as the 'Pistol'. It holds 15 rounds in a magazine and will sport a coloured compensator that corresponds to it's respective elemental mod, if modified with one.
Another screenshot shows a Colt Python. A unique, unusable version with a laser sight can be found in an abandoned bunker as part of a quest, simply being named as the 'Colt'.
Desert Eagle Mark I
The Desert Eagle Mark I from the first game returns as the 'Heavy Pistol'. It has a default 9-round capacity and modding the weapon with an elemental mod (such as fire, electric or poison rounds) will add a coloured compensator that would magically bestow the elemental properties.
Shotguns
Shotguns in Riptide are uncommon firearms that excel in close range engagements with the ability to easily dismember enemies and even dispatch high-level bosses with one shot if aimed carefully. Fixing elemental mods (such as electric, fire or poison mods) will manifest itself as the player specifically inserting different-coloured shells imbued with the element for the weapon. Like in Dead Island, each shotgun's appearance is randomly generated, with different stocks (or lack thereof), barrel chokes and sights attached to them.
Franchi SAS-12/PA8
The Franchi SAS-12/PA8 pump-action shotgun from the first game appears in a screenshot in the "They Thought Wrong" trailer.
Assault rifles in Riptide are initially scarce, but will later make more appearances mid-game and onwards being used by human NPCs both friendly and hostile. It offers additional firepower through the varying rates of fire, which is identified by the following prefixes: Auto Rifle, Burst-Shot Rifle and Single-Shot Rifle. Each rifle type in turn, is based off a certain family of weapons: "Auto Rifles" are mainly Kalashnikov rifles (which, as in the first game, are always modeled for some reason with short magazines); "Burst-Shot Rifles" are varying M16 models and "Single-Shot Rifles" are AR-15 variants. It also appears that like Dead Island the appearance of every assault rifle is random with different stocks, ironsights and barrel groups but still alluding to certain variants of each weapon system. Rifles can be upgraded for damage boots and modified to fire elemental rounds which manifests in the form of different coloured magazines loaded into the weapon.
'Auto Rifles'
AK-105
The AK-105 makes a return from Dead Island as one of the many different 'Auto Rifles' variants.
AK-74
The AK-74 and some variants return from the first game as a 'Auto Rifle'.
AKS-74
The AKS-74 is one of the possible variants of 'Auto Rifles' available for use.
AKS-74U
The AKS-74U is another variant of 'Auto-Rifles' that can be found in the game, although there can be versions with a full-size wooden/synthetic stocks.
'Single-Shot-Rifles'
Unidentified AR-15 Variant
An unknown AR-15 variant appears as a 'Single-Shot Rifle'.
'Burst-Shot Rifles'
Colt M16A1
The M16A1 rifle with A2 handguards (due to the smaller barrel profile of an A1) appears as a 'Burst-Shot Rifle' and as the name suggests, it incorrectly fires in 3-round bursts.
Sniper Rifles
Sniper rifles make their debut in Riptide. Rare and extremely powerful, sniper rifles offer long range options against enemies and shares it's ammo pool with assault rifles by using 'Rifle Ammo'. However, to balance their high damage output, no modification options are available for sniper rifles in-game.
NDM-86
The NDM-86 appears as the 'Semi-Auto Sniper Rifle' and can only be bought from rare vendors, usually in Henderson Town. A friendly NPC, Zoey also sells one after completing all of her three requests. It is depicted with a 5-round magazine and lighter wood furniture, compared to the original Dragunov SVD and it also features a mounted scope (with a reticle of a PSO-1). The ingame model is shared with the NDM-86 from Call of Juarez: The Cartel.
Remington M24
The Remington M24 with an light-OD finish appears as the 'Bolt-Action Sniper Rifle'. It can be bought from certain vendors, but one Common Quality rifle will always spawn on top of a billboard advertisement at Pinai Ferry Station. It is depicted as a single shot weapon, as the player pulls the bolt back and chambers a new round before locking the bolt back, not loading the internal magazine with additional rounds. The model is shared with the M24 featured in Call of Juarez: The Cartel
Grenades
M18 Smoke Grenade
The M18 Smoke Grenade returns again, functioning as an incendiary grenade once more.
Mk II Hand Grenade
The Mk 2 hand grenade returns from Dead Island, as a regular frag grenade.
Mounted Weapons and Launchers
GE M134
The GE M134 minigun called the 'Mounted Machinegun' can be found unassembled in certain 'hub areas' or base camps. Initially collapsed and kept in storage condition, the player(s) must carry them to pre-designated positions around their base and assemble them before being able to mount and fire the minigun. Contrary to common video game depictions, it actually has a limited ammo pool of 400 rounds, but otherwise has a unrealistic sluggish rate of fire compared to the real thing.
M72 LAW
The M72A2 LAW appears in the game as the 'M72 Launcher'. The launcher first appears on the ground during the story mission 'Evacuation'. It correctly holds only one shot, but incorrectly depicted as reloadable (instead of it's real-life disposable nature), with up to 6 additional rockets held by the player. The M72 LAW is unique in a sense that it is one of the few weapons in the game that is found consistent in both damage output and rarity, meaning there is only one version of the weapon and that it cannot be modified in any way.
Unusable Weapons
Beretta 92FS Inox
Some pre-release screenshots show Purna and Xia Ming with the Beretta 92FS Inox. Presumably there were placeholders of Dead Island's "McCall's 9mm", a legendary-grade pistol which did not make it into Riptide.
IMI Uzi
Sam. B has the same IMI Uzi tattoo from the first game.