UFO 50

UFO 50 is a video game collection developed and published by Mossmouth for Windows in September 2024 and for Nintendo Switch in August 2025. It features 50 unique games of varying genres and length. The games were a collaborative effort by six developers over the course of several years, its development akin to a game jam.
UFO 50 was critically acclaimed, and was the highest rated PC-exclusive of 2024 on Metacritic. Critics applauded the amount of variety, experimentation, and consistent quality that the collection provided, although some wished specific entries were expanded as their own separate releases. It won Best Indie Game at the New York Game Awards and received several nominations for the category at various award ceremonies.

Gameplay

UFO 50 is presented as a compilation of games similar to Cassette 50 and Action 52, developed by the fictional company UFO Soft for the fictional LX-I, LX-II, and LX-III series of video game consoles between 1982 and 1989. Half of the games feature a two-player mode, either versus or co-op. The main 50 games are playable from the start, with the hidden 51st game, Miasma Tower, accessible via inputting commands in the in-game terminal.
The order in which the games are presented is intended to show the history of UFO Soft's development slate, with some games having sequels, and others featuring cameos from previously released games. Each game also features short development notes informing their fictional creation.
The games belong to genres including shoot 'em up, platformer, and role-playing, each with a twist. The games vary in length and scope, with some being described as "shorter, arcade-style experiences", while others "have narratives and expansive worlds to explore", with one estimated to take upwards of 60 hours to complete fully.
When a game is completed for the first time, its border on the game selection screen will change from blue to gold. A more challenging win condition is also revealed, which grants a red border upon completion. Each game additionally includes a unique gift that will appear on the garden screen when certain requirements are met.

Story

Within the game are references to the metagame and a secret storyline about the fictional game development studio UFOSoft. Miasma Tower itself is a game secretly developed by fictional developer Gregory Milk, which details the state of UFO Soft circa July 1989. In-universe, the UFO 50 collection is stated to be developed by Milk and never released officially, with the files found in an abandoned warehouse by the Mossmouth developers, as shown in the faux-cracktro of the game.

List of games in ''UFO 50''

Director credits explicitly stated when directly sourced.

#	Name	Genre	Versus	Co-op	Fictional year of release	Directed by
1	Barbuta	Adventure, Platform			1982	Eirik Suhrke
2	Bug Hunter	Puzzle, Strategy			1983	Jon Perry
3	Ninpek	Arcade, Platform			1983	Eirik Suhrke
4	Paint Chase	Arcade			1983	Jon Perry
5	Magic Garden	Arcade			1984	Main Director: Derek Yu Additional Support: Jon Perry, Tyriq Plummer
6	Mortol	Platform, Puzzle			1984	Main Director: Jon Perry Additional Support: Paul Hubans
7	Velgress	Arcade, Platform			1984	Derek Yu
8	Planet Zoldath	Adventure			1984	Jon Perry
9	Attactics	Arcade, Strategy			1984	Derek Yu, Jon Perry
10	Devilition	Puzzle, Strategy			1984	Derek Yu, Jon Perry
11	Kick Club	Arcade, Platform			1984	Derek Yu
12	Avianos	Strategy			1985	Jon Perry
13	Mooncat	Platform			1985	Main Director: Eirik Suhrke Additional Support: Ojiro Fumoto
14	Bushido Ball	Sport			1985	Derek Yu, Tyriq Plummer, Jon Perry, Paul Hubans
15	Block Koala	Puzzle			1985	Derek Yu, Paul Hubans
16	Camouflage	Puzzle			1985	Jon Perry
17	Campanella	Arcade			1985	Main Director: Eirik Suhrke Additional Support: Ojiro Fumoto
18	Golfaria	Adventure			1985	Main Directors: Derek Yu, Tyriq Plummer Additional Support: Paul Hubans
19	The Big Bell Race	Sport			1985	Eirik Suhrke
20	Warptank	Adventure, Puzzle			1985	Eirik Suhrke
21	Waldorf's Journey	Arcade, Platform			1986	Jon Perry
22	Porgy	Adventure, Shooter			1986	Derek Yu, Tyriq Plummer
23	Onion Delivery	Arcade			1986	Main Director: Eirik Suhrke Additional Support: Paul Hubans, Tyriq Plummer
24	Caramel Caramel	Arcade, Shooter			1986	Eirik Suhrke
25	Party House	Strategy			1986	Jon Perry
26	Hot Foot	Sport			1986	Jon Perry
27	Divers	RPG			1986	Eirik Suhrke
28	Rail Heist	Platform, Strategy			1987	Main Director: Jon Perry Additional Support: Paul Hubans
29	Vainger	Adventure, Platform			1987	Derek Yu, Tyriq Plummer
30	Rock On! Island	Strategy			1987	Derek Yu, Paul Hubans
31	Pingolf	Sport			1987	Eirik Suhrke
32	Mortol II	Adventure, Platform			1987	Derek Yu
33	Fist Hell	Arcade			1987	Derek Yu
34	Overbold	Arcade, Shooter			1987	Jon Perry
35	Campanella 2	Adventure			1987	Eirik Suhrke
36	Hyper Contender	Platform, Sport			1988	Jon Perry
37	Valbrace	Adventure, RPG			1988	Main Directors: Tyriq Plummer, Derek Yu Additional Support: Paul Hubans
38	Rakshasa	Platform			1988	Director: Eirik Suhrke
39	Star Waspir	Arcade, Shooter			1988	Derek Yu
40	Grimstone	RPG			1988	Main Director: Derek Yu Additional Support: Paul Hubans
41	Lords of Diskonia	Strategy			1988	Jon Perry
42	Night Manor	Adventure, Puzzle			1988	Main Director: Paul Hubans Additional Support: Derek Yu
43	Elfazar's Hat	Arcade, Shooter			1988	Eirik Suhrke
44	Pilot Quest	Adventure			1988	Main Director: Derek Yu, Additional Support: Jon Perry
45	Mini & Max	Adventure, Platform			1989	Main Director: Jon Perry Additional Support: Paul Hubans
46	Combatants	Strategy			1989	Derek Yu
47	Quibble Race	Strategy, Simulation			1989	Derek Yu, Jon Perry
48	Seaside Drive	Arcade, Shooter			1989	Ojiro Fumoto
49	Campanella 3	Arcade, Shooter			1989	Eirik Suhrke
50	Cyber Owls	Platform, Shooter, Strategy			1989	Derek Yu, Paul Hubans, Tyriq Plummer
51	Miasma Tower				1989	Unknown

Development

and Jon Perry had previously developed a number of freeware games together using Klik & Play under the name Blackeye Software, with notable titles being Trigger Happy, Diabolika and Eternal Daughter. In 2016, the two decided to work together again on a project, making smaller scale prototypes for ideas. These prototypes eventually spiraled into the concept for UFO 50: a large collection of small games. The idea to create a collection came from Yu's belief that these concepts for games, if expanded, would not perform well enough as standalone releases in the current marketplace.
The first game in the collection to start development was Attactics, which was fully developed by Yu and Perry alone as a re-introduction into working together. Soon after, Eirik Suhrke was invited to join as both composer and designer, and the three started to brainstorm games on a private forum, with a majority of these concepts making their way into the final game. The number of games advertised in the collection was chosen by Yu because "it was the first number I could think of that was completely undeniable... that would advertise itself with its own existence." Three additional developers joined at various parts of development: Ojiro Fumoto, who previously developed Downwell, spent a half-year on the team and directed Seaside Drive; Paul Hubans, who previously developed Madhouse, serving as the lead director for Night Manor; and Tyriq Plummer, who previously developed Catacomb Kids, co-directing several of the collection's largest games including Valbrace. Every member of the team contributed design, writing, artwork, and programming to UFO 50, and provided work on the other's games.
UFO 50 was developed in GameMaker. It was officially announced in 2017 and expected to launch in 2018. However, due to complications with development, the game received a number of delays. These complications included rewriting older parts of the game's "prehistoric" code and the simultaneous development of Spelunky 2 in 2020, causing Suhrke and Yu stepping away from the UFO 50 project entirely until Spelunky 2 was released. One result of these complications led to at least one game being scrapped entirely during development. After eight years of development, the game released on September 18, 2024.
Every game in the collection imposes restrictions which could be found in games released during the era. These include using only a 32-color palette across each game, having a limited number of colors per sprite and having a set number of sound channels. Slowdown and sprite flickering, however, were not included as Yu believed that it would hinder the experience. A number of games across the collection reuse sound, assets and code. For instance, some of the Campanella games are stated to have been made in the same engine. Suhrke intentionally chose to not use NES-inspired sounds typically featured in other retro-inspired indie games, instead opting to use wavetable synthesis more similar to the TurboGrafx-16. Suhrke is UFO 50's sole composer and sound designer.