diff --git a/games/tetris/tetris.6 b/games/tetris/tetris.6
index 8b6ca563e499..32915f8c0967 100644
--- a/games/tetris/tetris.6
+++ b/games/tetris/tetris.6
@@ -1,4 +1,4 @@
-.\"	$NetBSD: tetris.6,v 1.17 2016/03/12 03:14:59 dholland Exp $
+.\"	$NetBSD: tetris.6,v 1.18 2023/07/01 10:51:35 nia Exp $
 .\"
 .\" Copyright (c) 1992, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -32,7 +32,7 @@
 .\"
 .\"	@(#)tetris.6	8.1 (Berkeley) 5/31/93
 .\"
-.Dd February 18, 2015
+.Dd July 1, 2023
 .Dt TETRIS 6
 .Os
 .Sh NAME
@@ -146,6 +146,11 @@ name, score, and how many points were scored on what level.
 Scores which are the highest on a given level
 are marked with asterisks
 .Dq * .
+.Sh ENVIRONMENT
+.Nm
+honors the informal standard
+.Dv NO_COLOR .
+When it is set in the environment, no color will be used.
 .Sh FILES
 .Bl -tag -width /var/games/tetris.scoresxx
 .It /var/games/tetris.scores
diff --git a/games/tetris/tetris.c b/games/tetris/tetris.c
index 286e7c455019..b8612c2c8fe3 100644
--- a/games/tetris/tetris.c
+++ b/games/tetris/tetris.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: tetris.c,v 1.33 2020/07/21 02:42:05 nia Exp $	*/
+/*	$NetBSD: tetris.c,v 1.34 2023/07/01 10:51:35 nia Exp $	*/
 
 /*-
  * Copyright (c) 1992, 1993
@@ -135,6 +135,7 @@ main(int argc, char *argv[])
 	int level = 2;
 #define NUMKEYS 7
 	char key_write[NUMKEYS][10];
+	char *nocolor_env;
 	int ch, i, j;
 	int fd;
 
@@ -182,6 +183,11 @@ main(int argc, char *argv[])
 	if (argc)
 		usage();
 
+	nocolor_env = getenv("NO_COLOR");
+
+	if (nocolor_env != NULL && nocolor_env[0] != '\0')
+		nocolor = 1;
+
 	fallrate = 1000000 / level;
 
 	for (i = 0; i <= (NUMKEYS-1); i++) {