20,000 Leagues Under the Sea
©1988 Coktel Vision
Adventure

20th Century Frog
©1988 Tomas Kettenring
Action

21
©1982 PCC, Inc.
Strategy

21 For 1 To 4
©1989 John Klein
Strategy Cards

2112
©19xx Anonymous
Adventure Interactive Fiction

21-en
©1991 HVB
Strategy

221 B Baker St.
©1987 Datasoft, Inc.
Adventure Strategy

240 Racing
©1998 Bralanda Software
Action Racing - Driving

2400 A.D.
©1988 ORIGIN Systems, Inc.
Adventure RPG

25
©1998 Devilish Games
Action

256snake
©2013 Brainstorm
Action

2601 Diguo Lianhe Jiandui (2601 Imperial Combined Fleet)
©1996 Nexus Interact Corp., 3G Group
Strategy

2FAST4YOU - Das Superheisse Bi-Fi Race
©1995 Art Department
Racing - Driving Sports

2x2
©2000 Ajt Soft
Educational