If you are looking for new or high-strategy games to play with just a pencil and paper, these are standout examples: Walter Joris' book of pen and paper games - BoardGameGeek
Balancing and replayability To keep games fresh, entries include randomized setups, asymmetric player powers, and scenario seeds. Replayability is enhanced by branching campaigns—short linked scenarios where earlier outcomes influence later setups—and by suggested “house rules” to nudge balance. Designers are advised to playtest each entry for at least 50 plays or iterations to identify dominant strategies, and balancing notes are included for common exploits and countermeasures. 100 strategic games for pen and paper pdf new
: Many games involve complex combinatorics or abstract strategy comparable to chess or Go. Math with Bad Drawings Top Picks for "Deep" Strategic Play If you are looking for new or high-strategy