LoopZ

Pieces can be placed on any empty space on the grid, and rotated into one of the four main compass directions.

Any pieces which are not part of the finished loop when a level is completed are left on the screen, so there is value in playing towards 2 distinct loops, to ensure that you have options depending on which pieces are drawn - unlike Pipe Dream there are no clues as to which pieces are coming next.

Three play modes are available, two of which can be played with two players.

Game A is freestyle - simply make loops, gaining extra points for size and style.

Game B is about unlocking bonus boards of the game by reaching a certain score and uses a bonus multiplier method depending on loop difficulty.

The third mode of play begins with an already made loop and then removes random pieces of it, so the player has to put them back in when they appear again.

It is essentially a memory test and logic puzzle of fitting the pieces back as one remembers - although placing a piece where it seems to fit is also often effective.

LoopZ for Game Boy is currently worth €17.99 loose, €19.70 complete in box, and €53.42 factory sealed. Prices are based on real sales and update regularly on Gamevaro.

LoopZ has a steady sales history on the tracked marketplaces, meaning it trades hands regularly and isn't considered particularly rare.

Loose means cartridge or disc only, CIB (complete in box) includes the original box and manual, and sealed means factory-sealed and never opened. For LoopZ, loose is €17.99 and CIB is €19.70 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.

The PAL version of LoopZ is currently worth €17.99 loose, versus €33.91 for NTSC-U. Regional price differences usually come down to print run size and regional collector demand.