OpenTomb is a cross-platform reimplementation of classic Tomb Raider 1—5 engines that were developed by now defunct Core Design. It is not a patcher or DLL extension of already existing engines.
The project does not use any old Tomb Raider source code, because all attempts to retrieve sources from Eidos / Core were in vain, despite many petitions by the community. Instead, everything is being developed completely from scratch.
However, we're extensively using official and unofficial editing tools, as well as bits of original debug mappings to restore and reverse-engineer game mechanics.
OpenTomb supports level files from all retail Tomb Raider PC versions. Additionally, demo versions of TR1-4 are partially supported. Aside from this, it supports custom levels built with TRLE and Dxtre3d level editors. However, it doesn't support encrypted NGLE levels.
OpenTomb was in a stage of intensive development for all the past year, but until now, we haven't touched the sacred ground of triggers and entities interaction. Now the time has come, and for the first time we can see interactive (yet very rough) environment in City of Vilcabamba. Consider this a milestone, because now you can really finish the level with a little help of noclip.
Unlike original Tomb Raiders, where we had predefined and hardcoded routines for each entity type, OpenTomb allows you to program every single entity in game - all the code is done in Lua scripts. There is more to follow - timed triggers, pick-ups - and, of course, inventory!
Latest tweets from @open_tomb
Item combine works! Currently script is completed for TR4, including puzzle/key combos and waterskin puzzle. T.co
Oct 11 2014, 6:23am
At last! Lara picks up and uses things! Currently works for all keys and puzzles in TR1-4. Next stage: item combine! T.co
Oct 10 2014, 11:56am
Sorry for big delay! Now for the news - Lara now learns how to pick up things! T.co
Sep 27 2014, 2:35pm
Jun 28 2014, 3:48pm
Loading screens and full-screen effects functionality! T.co
Jun 15 2014, 5:34pm
New set game feature: T.co
May 28 2014, 6:57am
@Roli29 Congratulations! Great level! ;)
May 26 2014, 2:38pm
OpenTomb article at Tomb Raider wikia: T.co
May 26 2014, 3:31am
Moving object lights: T.co Thanks again, Saracen!
May 25 2014, 5:28pm
Character leaning implemented: T.co
May 23 2014, 7:30am