Mortal Kombat Trilogy is a fighting game developed and published by Midway. It is a compilation of content from the previous titles based primarily upon the gameplay mechanics of Mortal Kombat 3 and Ultimate Mortal Kombat 3. It follows the same story of Mortal Kombat 3 but contains all characters and most of the stages from Mortal Kombat, Mortal Kombat II, Mortal Kombat 3, and Ultimate Mortal Kombat 3.
* Mortal Kombat Trilogy introduces the Aggressor bar, which fills as the combatants fight. When the bar fills, the character becomes much faster and stronger for a short period of time.
* A finishing move known as a Brutality is featured in this game. This finishing move requires the player to perform an 11 button combo which causes their opponent to explode. Brutalities were also added to the Genesis and SNES ports of UMK3.
* Many of Mortal Kombat Trilogy characters have brand new special moves and finishing moves. Several have unused special moves never implemented in previous games. They make their first official appearance in Mortal Kombat Trilogy. These special moves include MK1 Kano's Spinning Blade move, MK2 Kung Lao's Air Torpedo, Goro's Spinning Punch move, Raiden's lightning that shoots from behind the opponent, and Baraka's Blade Spin move. In addition, Shao Kahn has a throw move and a grab and punch move that is exclusive to this game, and Motaro has added an overhead toss to his arsenal.
* The spelling mistake in Jade's ending ("Komabt", seen in the arcade version) is corrected.
* In the PlayStation version, there's an option that lets the system load two additional characters into memory when playing as Shang Tsung, eliminating the long loading delays of MK3 and UMK3 when morphing.
* Shang Tsung never appears anywhere within the "Choose Your Destiny" towers, probably because of the loading delays when morphing in the PlayStation version. The only time the CPU ever controls Tsung is during the attract mode.