diff --git a/esds/__main__.py b/esds/__main__.py
index dbc333a..8797f2d 100644
--- a/esds/__main__.py
+++ b/esds/__main__.py
@@ -1,14 +1,23 @@
 import sys, argparse
 
-def run(args):
-    print(args)
+def run(arguments):
+    parser = argparse.ArgumentParser(description='Run a simulation')
+    parser.add_argument("platform", help="Run a simulation using a specific platform file")
+    args = parser.parse_args(arguments[1:])
+    if args.platform:
+        print("Run simulation using "+args.platform)
+    else:
+        parser.print_help()
 
 def main():
     ##### Parse arguments
-    parser = argparse.ArgumentParser(description='ESDS Simulator CLI toolbox. Allow you to run simulations and perform various tasks.')
-    parser.add_argument("run", help="Run a simulation", nargs="*")
+    parser = argparse.ArgumentParser(
+        description='ESDS Simulator CLI toolbox. Allow you to run simulations and perform various tasks.')
+    parser.add_argument("run", help="Run a simulation", nargs=argparse.REMAINDER)
     args = parser.parse_args()
 
     ##### Run commands
     if args.run:
         run(args.run)
+    else:
+        parser.print_help()