▲
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: Memories of Celceta
Ys IV: The Dawn of Ys
Ys IX: Monstrum Nox
Ys IV: Mask of the Sun
Ys VIII: Lacrimosa of Dana
Mega Man Powered Up
Guilty Gear XX Accent Core Plus
Resident Evil Portable
Manhunt 2
Mana Khemia 2: Fall of Alchemy
Parasite Eve
Command & Conquer: Red Alert
Dynasty Warriors 6
Jumping Flash!
Angry Birds
Persona 2: Eternal Punishment
Destruction Derby
Dino Crisis 2
Vib-Ribbon
Resident Evil 2
Star Wars: The Force Unleashed
Puyo Pop Fever
Harvey Birdman: Attorney at Law
King's Field
Silent Hill
Fighting Force
Worms
Tekken 2
Sonic Rivals 2
Tomb Raider: The Last Revelation
Tom Clancy's Rainbow Six: Vegas
Um Jammer Lammy
Danganronpa: Trigger Happy Havoc
Lunar 2: Eternal Blue Complete
Earthworm Jim PSP
Ridge Racer Type 4
Kurohyou 2: Ryuu ga Gotoku Ashura-hen
Fatal Fury
The Misadventures of Tron Bonne
Crash Tag Team Racing
The Idolmaster SP
Metal Gear Solid: Portable Ops
WALL-E
Oddworld: Abe's Exoddus
World Heroes
The King of Fighters '95
Mind Quiz
Myst
Mega Man Legends 2
Final Fantasy Type-0