Oddworld: Abe's Exoddus is a platform video game developed by Oddworld Inhabitants and published by GT Interactive. It is a sequel to the video game Oddworld: Abe's Oddysee. It is considered a spin off title in the Oddworld series, and not part of the main Oddworld Quintology. It was released in 1998 for the PlayStation video game console and Microsoft Windows for North America, Europe and Australia, and in 1999 for the PlayStation in Japan as titled: Abe '99 （エイブ99, Eibu Nainti Nain). It was re-released on the PlayStation Network on October 22, 2009.

The game continues the story of Abe, charting his efforts to save his fellow Mudokons from another plot by the Glukkons to exploit them. Abe discovers that the Glukkons are enslaving Mudokons, this time to produce a drink called Soulstorm Brew, which uses Mudokon bones and tears as its ingredients. The player assumes the role of Abe, embarking on a quest to halt production of SoulStorm Brew.

The game was released to similar critical acclaim as the first title. Reviews praised the game's ability to allow the player to quick save anywhere they liked, a feature that was not present in Abe's Oddysee, while noting that it was very similar to that title. The game won multiple awards upon release.

Abe's Exoddus is a two-dimensional platform game, with many of its features taken from the previous title, Abe's Oddysee. The game is split into screens; when the player moves into the edge of the screen, the environment is replaced, just like in the previous title. Most screens include various puzzles that must be solved through the use of Abe's unique abilities: "GameSpeak", possession, controlling mine cars, activation or deactivation of mines or levers, and rocks, grenades, or bones that can be picked up and used for different purposes. Normal abilities include creeping, walking, running, rolling, hoisting, jumping, and crouching, all of which have specific application and make up a necessary arsenal of moves.

The game features no user interface or heads-up display. Information is conveyed to the player through instructive screens that can be activated by the player character, or through scrolling messages in the background. Characters do not have hit points; instead, being attacked (such as being shot or mauled) generally causes instant death. However, the player has unlimited lives, and upon death will re-spawn at the last checkpoint they reached. Abe's Exoddus includes an option to quick save which allows the player to designate their own checkpoints, a feature which was not present in Abe's Oddysee due to programming conflicts and which attracted criticism of that title.

While the focus of the gameplay is surmounting screens, there is a secondary focus on rescuing enslaved Mudokons. GameSpeak is a pivotal ability in this respect; by pressing combinations of buttons, the player character will utter short phrases that can be used to control allied non-player characters—to pull extra levers, to follow the player character, to attack enemy characters in the current screen, or simply to wait.

Unlike the first game, Mudokons have emotional states and status ailments that affect how they respond to the player's character. Mudokons may be angry, wired, depressed, sick, or blind, and each state must be dealt with differently by the player. Angry, wired or depressed characters can be consoled through GameSpeak, whilst sick Mudokons can only be cured with a special chant, obtained when the player character finds a helper character. Blind Mudokons will keep walking in the direction of the player character's voice, and must be told to wait before they walk into a hazard.

Possession is the player character's ability to take control of certain characters in the same screen by chanting. When a character is possessed, the player can use their abilities and weapons to find otherwise unreachable areas or levers, kill enemies, or as part of solving puzzles. However, when possessing a character, the player character remains immobile and vulnerable to attack.

The player can abandon possession of a creature at any time. Scrabs or Paramites will be released without harm when abandoned, while Industrialists (Sligs and Glukkons) will burst into pieces. If the player character has drunk Soulstorm Brew, they will be able to possess their own fart, which can then be used as a flying explosive and will detonate either when control is abandoned, or after a period of time.

Slave Mudokons are rescued through Bird Portals. If the player character chants when in the same screen as a Bird Portal, the portal will activate, and any nearby Mudokon slaves will run through it, disappearing. Rescuing Mudokons is not usually crucial to progressing through the game; however, rescuing at least 150 is necessary to get the good ending, and many secret areas revolve around rescuing a few Mudokons in particularly complex situations.

The player can also gain the ability to turn into the Shrykull, a Mudokon supernatural demigod. Abe acquired this power at a late stage in Abe's Oddysee. The ability is earned by sending a certain number of Mudokons through a bird portal at once, denoted by a number circulating with the birds. With the ability, the player can enter a screen with enemies or explosives, chant to transform into the Shrykull, and vaporize all enemies and hazards on the screen. Afterward, the player character turns back into Mudokon form. Achieving the ability and doing such is necessary to get past certain points in the game. The player can only turn into the Shrykull once each time they earn the ability, so where and when they choose to use it is important.

Allies, enemies and wildlife

Allies in the game include Mudokons, humanoid species encountered as rescuable slaves and helpers. Normally, they will follow any GameSpeak-given order, but as described above, some Mudokons will be emotional and must be consoled by the player character first. The player character can also possess other creatures, in order to gain help with a task. For example, when possessing a Paramite, the player character can use GameSpeak to communicate with other Paramites, in much the same way as Mudokons.

Enemies in the game primarily consist of Sligs, semi-robotic creatures who will attempt to kill the player character on sight. Although most have mechanical legs and carry machine guns, some Sligs wear helicopter flight packs and launch grenades. Some Sligs choose to sleep without wearing mechanical legs, in which case they are vulnerable until they can obtain a set. Sligs can be possessed by the player character, who can then control the Slig and utilize its weapon. Sligs cannot see in dark shadows, which create natural hiding places for the player character. Sligs are often accompanied by Slogs, bipedal dog-like creatures that chase and attack the player character on sight. Slogs can be commanded if the player possesses a Slig, and can be ordered to attack and kill enemies. Sloggies are the puppy form of Slogs, and are slower but just as deadly if the player character encounters them. Slogs and Sloggies can be distracted with bones.

Other enemies include Greeters, robotic security guards originally designed for public speaking and advertising, until they began to attack their customers. Greeters have motion detectors, and if the player character or another Mudokon triggers a Greeter's detector, the Greeter will give chase and attempt to kill the victim with an electric charge.

Glukkons feature as the game's primary antagonists. Glukkons are tall-foreheaded, humanoid creatures who are ruthless, malevolent businessmen. They walk on their arms as their feet are located upon their chest, and as a result they are physically defenseless and rely on Sligs to protect and serve them. They are the owners and bosses of the industries Abe visits throughout the game, and the masters of the Mudokon and Slig slaves. Glukkons can be possessed by the player, and can be made to command Sligs through GameSpeak, either to kill other characters, or to pull levers and move platforms.

Animals and wildlife consist of the Scrabs and aforementioned Paramites, both carnivorous predators that are encountered in the burial vaults of Necrum. Scrabs are highly territorial and chase any other life form on sight. Should they encounter another Scrab, a short fight ensues in which one is killed. Paramites are pack hunters, and when the player encounters a single Paramite, the Paramite will flee and not attack the player unless they are cornered. When encountered in groups of two or more, Paramites will pursue and attack the player. Paramites can be distracted with chunks of meat.

Other wildlife include the Fleeches, worm-like creatures that live in the Oddworld underworld. When woken from sleep, they will chase the player character and any other Mudokons, attacking with their long tongues before swallowing the victim whole. Fleeches fear Scrabs and Paramites and try to avoid them whenever possible. Fleeches are the only enemy that cannot kill Abe in one hit and it is possible to run away from Fleeches while they are attacking before they hit Abe enough to kill him, They are also the only enemies that can navigate up platform edges. Slurgs, the lowest form of life on Oddworld, are often found alongside Fleeches, as when stepped on by the player character, Slurgs emit a noise that wakes Fleeches from sleep.