Most beginners looking for grading help have circulated coins, and fortunately circulated coins are the easiest for the novice to grade. It helps to have a Mint State specimen of the coin type under consideration to make comparisons to, but this isn't a requirement.
1 Player 2 Players 3D Action Adventure Advert Games Animal Army Ball Basketball Billiards Blood Bomberman Buy Equipment Upgrades Car Cat Dress Up Fighting Food Football Fun Funny Girl Guns Mario Matching Motorcycle Puzzle Racing Shooting Skateboard Soccer Stick War Zombies.
This includes one-player variants of social games. The best known one-player game is probably Klondike solitaire, a simple matching game played with cards. Other solitaire card games include Pyramid and Spider. Aside from card games, marbles can be played by yourself, as can checkers and even chess.