A collection of 34+ multi-player abstract strategic games based on the concept of mental arithmetic, puzzle, tic-tac-toe, pattern recognition, and magic square. Every move you and your opponents make will influence your next move. The 4 basic games include FOUR EYES SQUARE, MAGIC SCARCE, ANTI-MAGIC SQUARE, and HIDDEN FLUSH. Our Vol.II & Vol.III downloadable manuals include another 20 new games - MAGIC LINK GO - Three in A Row, MAGIC LINK GO - Quadrilaterals, TRIPLE-SUM-ASSAULT, MYSTIC STACKER, PRIME-A-PAIR, MATCH UP 17, ‎EYES TO EYES, THIRTY SUM THINK!, TRIGINTA GENUS, KETTEN MAX, MAGIC SLIDER, ARITHMETIC WARLORDS, EYES ON PATHS, NUMMERFEST, TUG OF SUM, NUMBER-MINES, TIT-FOR-TAT, BINARY FOE, SERIAL LINKER, TOLL POSITIONS, FEUDAL MAGIC, DECEITS, SWIVEL PASS, CYCLIC BITS, MAGIC DEFUSER, MAGIC SUMS OF FOUR, EVENS AND ODDS, FRACTIONAL WAR, PRODUCTS FIGHTS, and EYE OPENER. More new games are coming in 2018. For a brief description of each game, please visit our BLOG page https://www.quxacto.com/blog-1/category/English-Posts . These all-new innovative games are designed to train your mental arithmetic, memory, pattern recognition, problem solving, strategy formulation and planning skills. Each game is goal-driven and has a set of rules in which players can play against each other competitively. They are very educational and challenging for players of all ages. MELENCOLIA games are truly designed for the whole family, from youngsters to elderly and all ages in between. Students can practice their math skills while playing these games interactively with each other in the classroom. Requires the Qu-MAT (sold separately) to play.