Play GMod sandbox as the real LEGO Marvel Iron Man, Hulk, Spider-Man and Thor: powers, studs, and falling apart into bricks.
Play Garry's Mod sandbox as the real LEGO MARVEL Super Heroes minifigures.
When the map loads you pick a hero. Each one is the actual character from your own copy of LEGO MARVEL Super Heroes: model, textures, icon and sound effects are read from your installed game the first time you press Play (about half a minute, once). Nothing from LEGO Marvel is in the download.
The rest of sandbox is untouched: spawn menu, physics gun and tool gun work as usual. F3 reopens the hero picker; take out "Hero Powers" (slot 1) to use powers.
Single player.
Built with an AI coding agent (Claude). Unofficial fan mashup: LEGO MARVEL Super Heroes is by TT Games / Warner Bros. Interactive Entertainment, LEGO is a trademark of the LEGO Group, Marvel characters are (c) Marvel, Garry's Mod is by Facepunch Studios. File-format research drew on the TTGames-Workshop notes by Loomirr and Luigi Auriemma's ttgames.bms. The mashup's own code is MIT licensed.