▲
1
▼
Ys vs. Trails in the Sky: Alternative Saga has an anti-piracy feature activated if the game detects the PlayStation Portable's system firmware is illegitimate. During a match, the collisions for walls and some floors will be turned off at random points, occasionally causing players to clip through walls or fall out of bounds before respawning back at the starting location. Additionally, some bosses and enemies will not respawn if they fall off the map, making fights with them unwinnable.
▲
1
▼
According to Toshihiro Kondo during an interview in Issue #459 of Dengeki PlayStation Magazine, Ys vs. Trails in the Sky was made because Nihon Falcom wished to make use of the PlayStation Portable's wireless ad hoc local multiplayer function, which they had been unable to work into their JRPG titles. They also felt that while both Trails and Ys were JRPGs, both series had many themes related to battle and conflict, lending them a natural transition into a fighting game.
Archived blog post regarding the interview:
https://web.archive.org/web/20121224231750/https://andriasang.com/come6u/ys_vs_legend_of_heroes/
Siliconera article about game announcement in Dengeki PlayStation Magazine:
https://www.siliconera.com/falcom-making-ys-vs-legend-of-the-heroes-fighting-game/
Dengeki PlayStation Magazine Issue #459 (November 27, 2009) table of contents scan:
https://www.retromags.com/magazines/jpn/dengeki-playstation/dengeki-playstation-issue-459/
https://web.archive.org/web/20121224231750/https://andriasang.com/come6u/ys_vs_legend_of_heroes/
Siliconera article about game announcement in Dengeki PlayStation Magazine:
https://www.siliconera.com/falcom-making-ys-vs-legend-of-the-heroes-fighting-game/
Dengeki PlayStation Magazine Issue #459 (November 27, 2009) table of contents scan:
https://www.retromags.com/magazines/jpn/dengeki-playstation/dengeki-playstation-issue-459/
Related Games
Ys VIII: Lacrimosa of Dana
Ys IX: Monstrum Nox
Ys IV: Mask of the Sun
Ys IV: The Dawn of Ys
Ys: Memories of Celceta
Harvest Moon: Hero of Leaf Valley
Twisted Metal 2
Chrono Trigger
Jak and Daxter: The Lost Frontier
Crash Bandicoot: Warped
Disgaea: Afternoon of Darkness
Wipeout
Tomba! 2: The Evil Swine Return
WWE SmackDown! vs. Raw 2006
Sonic Robo Blast 2
Danganronpa: Trigger Happy Havoc
Marvel Nemesis: Rise of the Imperfects
WWE SmackDown vs. Raw 2011
The Idolmaster SP
The King of Fighters '96
Kurohyou 2: Ryuu ga Gotoku Ashura-hen
Tony Hawk's Underground 2 Remix
God of War: Chains of Olympus
Tactics Ogre: Let Us Cling Together
Metal Gear Solid: Peace Walker
The King of Fighters '94
Mega Man Powered Up
WWE All Stars
Persona 2: Innocent Sin
Vib-Ribbon
Crash Bandicoot 2: Cortex Strikes Back
Gods Eater Burst
Syphon Filter
The Simpsons Game
Despicable Me: The Game
NBA 2K13
Destruction Derby
Mind Quiz
Cross Days
Super Monkey Ball Adventure
Warriors Orochi 3
Crash Bash
Lunar 2: Eternal Blue Complete
Magician Lord
Pandemonium!
Mega Man 8
The King of Fighters '95
Silent Hill: Origins
Tekken
King's Field