diff --git a/src/com/annimon/everlastingsummer/Lexer.java b/src/com/annimon/everlastingsummer/Lexer.java
index c81d43e..71604da 100644
--- a/src/com/annimon/everlastingsummer/Lexer.java
+++ b/src/com/annimon/everlastingsummer/Lexer.java
@@ -54,6 +54,8 @@ public final class Lexer {
         KEYWORDS.put("if", TokenType.IF);
         KEYWORDS.put("else", TokenType.ELSE);
         KEYWORDS.put("endif", TokenType.ENDIF);
+        KEYWORDS.put("or", TokenType.OR);
+        KEYWORDS.put("and", TokenType.AND);
         KEYWORDS.put("not", TokenType.NOT);
         
         KEYWORDS.put("renpy.pause", TokenType.RENPY_PAUSE);
diff --git a/src/com/annimon/everlastingsummer/Parser.java b/src/com/annimon/everlastingsummer/Parser.java
index fea8065..8d812ff 100644
--- a/src/com/annimon/everlastingsummer/Parser.java
+++ b/src/com/annimon/everlastingsummer/Parser.java
@@ -412,7 +412,35 @@ public final class Parser {
     }
     
     private Expression expression() {
-        return notTest();
+        return orTest();
+    }
+    
+    private Expression orTest() {
+        Expression expression = andTest();
+        
+        while (true) {
+            if (match(TokenType.OR)) {
+                expression = new BinaryExpression(Operator.BOOLEAN_OR, expression, andTest());
+                continue;
+            }
+            break;
+        }
+        
+        return expression;
+    }
+    
+    private Expression andTest() {
+        Expression expression = notTest();
+        
+        while (true) {
+            if (match(TokenType.AND)) {
+                expression = new BinaryExpression(Operator.BOOLEAN_AND, expression, notTest());
+                continue;
+            }
+            break;
+        }
+        
+        return expression;
     }
     
     private Expression notTest() {
diff --git a/src/com/annimon/everlastingsummer/TokenType.java b/src/com/annimon/everlastingsummer/TokenType.java
index 7fcaf25..89a0cd6 100644
--- a/src/com/annimon/everlastingsummer/TokenType.java
+++ b/src/com/annimon/everlastingsummer/TokenType.java
@@ -52,6 +52,8 @@ public enum TokenType {
     IF,
     ELSE,
     ENDIF,
+    OR,
+    AND,
     NOT,
     
     // команды
diff --git a/src/com/annimon/everlastingsummer/ast/BinaryExpression.java b/src/com/annimon/everlastingsummer/ast/BinaryExpression.java
index 50dbfcc..ee60b60 100644
--- a/src/com/annimon/everlastingsummer/ast/BinaryExpression.java
+++ b/src/com/annimon/everlastingsummer/ast/BinaryExpression.java
@@ -7,6 +7,7 @@ public class BinaryExpression implements Expression {
     
     public static enum Operator {
         ADD, SUBTRACT,
+        BOOLEAN_OR, BOOLEAN_AND,
         EQUALS, NOTEQUALS,
     }
 
@@ -28,6 +29,8 @@ public class BinaryExpression implements Expression {
             case SUBTRACT: return leftVal - rightVal;
             case EQUALS: return (leftVal == rightVal) ? 1 : 0;
             case NOTEQUALS: return (leftVal != rightVal) ? 1 : 0;
+            case BOOLEAN_OR: return ((leftVal != 0) || (rightVal != 0)) ? 1 : 0;
+            case BOOLEAN_AND: return ((leftVal != 0) && (rightVal != 0)) ? 1 : 0;
             default:
                 throw new RuntimeException("Неизвестный оператор " + operator.name());
         }