You could start a game, open the lid, swap discs, reset, and play the second game (can confirm on PS1, not sure on PS2 or GC). Unlike swapping cartridges in a SNES or MegaDrive and resetting without powering down, doing this wouldn’t lead to a super weird game.
The PS1’s Monster Rancher games would give you different monsters depending on what disc you put for the game to read when it asked.
You could start a game, open the lid, swap discs, reset, and play the second game (can confirm on PS1, not sure on PS2 or GC). Unlike swapping cartridges in a SNES or MegaDrive and resetting without powering down, doing this wouldn’t lead to a super weird game.
The PS1’s Monster Rancher games would give you different monsters depending on what disc you put for the game to read when it asked.